Showing posts with label Navy. Show all posts
Showing posts with label Navy. Show all posts

Thursday, 14 May 2020

the Formal Surrender of Hitler's U-boats

U-Boats moored at Lisahally, Londonderry.
 IWM Public Domain

The Battle of the Atlantic was the longest battle of the Second World War beginning with the sinking of the liner SS Athenia by German submarine U-30 a matter of hours after the British declaration of war on 3rd September 1939. German submarine or U-Boat activity continued until the VE Day on 7th May 1945. During this battle the German Navy the Kriegsmarine attempted to cut off the United Kingdom’s overseas supply lines most notably the transatlantic routes. The U-Boat was the Kriegsmarine’s workhorse in this regard. So critical was this battle to the survival of the United Kingdom that Britain’s wartime leader Winston Churchill described it as his greatest fear.
Though the command of Western Approaches was in Liverpool many of the escort vessels that protected Allied convoys were based in Northern Ireland ports most notably the port of Londonderry. Derry as the city is also commonly called is the UK’s most western port and a stone frigate (naval shore base) HMS Ferret was established there in 1940. Londonderry is Northern Ireland’s second city and is situated on a tidal section of the River Foyle just before it flows into Lough Foyle and into the North Atlantic. The importance of Derry to the battle is shown that by 1943 more ships were stationed there than Liverpool, the Clyde and Belfast. At its peak the city and its outlying port facilities at Lisahally just beyond the city limits catered to 139 ocean going vessels. Following the entry of the United States into the war the city hosted a strong American presence although the bulk of Allied naval personnel were British and Canadian.
On 4th May 1945 as Berlin fell Grand Admiral Karl Donitz who had following Hitler’s suicide three days earlier inherited the leadership of Nazi Germany ordered his U-Boats to ceasefire. The message he sent them read “Undefeated and Spotless, you lay down your arms after a heroic battle without equal.” From that date U-Boats began surrendering whenever they met an Allied ship although some commanders scuttled their submarine before it fell into Allied hands.

View of Londonderry with warships along the quay
While many of the crews did fight a heroic battle, Winston Churchill himself paying tribute to the ‘fortitude of the U-Boat Service’ they had quite decisively been beaten in the Battle of the Atlantic. The Commander in Chief of Western Approaches Admiral Sir Max Horton took issue with this statement. He was a veteran of the 1st World War (ironically as a submarine commander) and was aware that the Germany had blamed its defeat in that conflict on the stab in the back myth. This was the myth that the German armed forces in the field were undefeated and that Germany had lost the war because the civilians and politicians at home gave in and betrayed them. This was a myth but Horton was aware that the Nazis had used this belief to their advantage during their rise to power and it played into their rearmament and expansionist policies. Fearing that a similar myth regarding the German armed forces in the Second World War might lead to history repeating itself. Horton sought to dispel it before it could take hold so he planned a formal surrender ceremony.
Londonderry was chosen to be the place where this ceremony would take place due to the role it played but also probably for practical reasons regarding the range and seaworthiness of some of the U-boats. The first eight U-Boats sailed into Lough Foyle on Monday 14th May 1945 with a skeleton Kriegsmarine crew and under the Royal Navy command. The U-Boats flew the British white ensign and were escorted by the British, Canadian and American destroyers HMS Hesperus, HMCS Theford Mines and USS Robert I Paine. The U-Boats docked at Lisahally and their crews led by Oberleutnant Klaus Hilgendorf commander of U-1009 formally surrendered to Admiral Sir Max Horton, who had flown into nearby Royal Naval Air Station Eglington (HMS Gannet) that morning specifically for the occasion. Horton was joined by the Prime Minister of Northern Ireland Sir Basil Brook and Colonel Dan Bryan the Irish Free State’s Director of Military Intelligence. The event was also witnessed by many of the locally based Allied soldiers, sailors and airmen, most notably the WRNS from HMS Ferret and Fleet Air Arm personnel from HMS Gannet and HMS Shrike (RNAS Maydown).
Free Polish destroyer ORP Krakowaiak toes U-2337 out of Lough Foyle
for scuttling as part of Operation Deadlight 28th November 1945
Following the surrender more U-Boats found themselves moored on the Foyle from where they were towed of the coasts of Counties Londonderry and Donegal and systematically sank in what was known as Operation Deadlight. 116 boats were destroyed this way, being towed to three main zones where they were sunk either by scuttling, naval gunfire or aerial target practice depending on which zone they were towed to. This operation commenced on 17th November 1945 and completed on 11th February 1946.

Thus the end of Hitler’s U-Boat fleet happened in Northern Ireland. Winston Churchill said of Northern Ireland’s role

“By the grace of God Ulster stood a faithful sentinel”
“That was a dark and dangerous hour. We were alone, and had to face single-handed the full fury of the German attack raining down death and destruction on our cities and, still more deadly, seeking to strangle our life by cutting off the entry to our ports of the ships which brought us our food and the weapons we so sorely needed.
Only one great channel remained open. It remained open because loyal Ulster gave us the full use of Northern Irish ports and waters, and thus ensured the free working of the Clyde and the Mersey.
But for the loyalty of Northern Ireland we should have been confronted with slavery and death and the light which now shines so strongly throughout the world would have been quenched.
The bonds of affection between Great Britain and the people of Northern Ireland have been tempered by fire and are now, I believe, unbreakable.”
“We have traveled a hard and darksome road to victory in Europe, and at every turn in this memorable journey the loyalty and courage of Ulster have gleamed before the eyes of men.
The stand of the Government and People of Northern Ireland for the unity of the British Empire and Commonwealth and for the great cause of freedom, for which we all risked our survival will never be forgotten by Great Britain. A strong loyal Ulster will always be vital to the security and well-being of our whole Empire and Commonwealth”

Friday, 20 September 2019

Britain's other Fleet

HMC Seeker might look like a vessel of the Royal Navy however this is not so
as evidenced by the fact she is wearing a blue ensign and not the white ensign
The United States Coast Guard is sometimes thought of as a sort of second navy for the USA. Although often regarded as a Search & Rescue organisation it is also a law enforcement organisation and protecting American waters from smugglers, piracy and other criminality as well as being an official branch of the armed forces. The United Kingdom in contrast does not quite have an equivalent. The UK does have Her Majesty's Coastguard which is a safety and search & rescue authority and the Royal Fleet Auxiliary which is a fleet of civilian maned vessels owned by the Ministry of Defence. However its already considered a branch of the Naval Service and its role is to support Britain's interests and Armed Forces logistically rather than conduct naval activities such as intercepting and boarding vessels. In regard to law enforcement the vessels of the Border Protection Squadron of the Home Office's Border Force is Britain's closest equivalent.
The vessels of the Border Force trace their history back to various revenue and customs cutters (a cutter originally being a term for a sailing vessel designed for speed rather than capacity) in the 18th Century to tackle illegal smuggling. The Border Force fleet acknowledges this history calling their vessels cutters to this day; the prefix before the name of the largest Border Force vessels is HMC meaning "Her Majesty's Cutter".

Cutters are principally to board ships suspected of illegally breaching Britain's borders e.g. smuggling which could mean everything from smuggling in French beer to avoid tax to more serious crimes such as drug smuggling or human trafficking, and are at sea 24/7 as explained in this video produced for the Royal Yachting Association.


The current fleet consists of about eleven vessels which vary in size from the 20m RIB Coastal Patrol Vessel like that shown in the above clip to the Telkkä-class Cutter. The total crew compliment across the fleet numbers roughly 120 Border Force officers spread across fleet who normally rotate between spending two weeks on duty and two weeks off duty. This way there are at least five fully operational cutters on duty around the UK at anyone time.
The vessels of the Border Protection Squadron usually operate in the waters around the United Kingdom however they can and have been sent further afield. In 2015 for example HMC Protector and Seeker were deployed alongside Royal Navy and Royal Fleet Auxiliary and other European Customs, Coast Guard and Naval vessels in the Mediterranean to assist in the Migrant Crisis, for this the normal crew compliment was bolstered with a detachment of Royal Marines. Whilst there the two ships helped rescue 1650 refugees and apprehended 26 people traffickers.  As this interview by the Gibraltar Broadcast Corporation details


Boarder Force vessels sail under blue ensign as defines ships in state service sometimes defaced with the badge of the Boarder Protection Squadron.
ensign worn by some Border Force vessels
The badge features a red roundel with the text "Border Protection Squadron" within this badge is a red portcullis on a blue and white wavy field. The badge is ensigned with the St Edward's Crown. This badge is often displayed on the superstructure or cabin of cutters and offshore patrol vessels, although formally the variant of the Royal Coat of Arms used by the Home Office was used in the latter role and this might still be the case on some cutters. Traditionally customs cutters flew a distinguishing pennant. Although such decorations were the sole right of a ship at war the Admiralty turned a blind eye to this providing they were distinct from Royal Navy pennants. I am not sure if Border Force cutters continue this tradition however I have noted in some clips and images that some cutters seem to have a pennant like flag flying from the jackstaff.
The Border Force Fleet is as follows:

UKBF 42m Customs Cutter

These vessels are a variant of the Damen Stan 4207 Patrol Vessel built by the Dutch Damen Group which has provided similar vessels for the Royal Bahamas Defence Force, Jamaican Defence Force, Mexican Navy and Venezuelan Navy among others. Damen's design includes the ability for an emplaced cannon and while at first sight it appears that the Boarder Force vessels of this class also feature one, it is in fact a water cannon. Border Force personnel are not armed with firearms, but can call on ships and personnel of the Royal Navy and National Crime Agency for firearms support. These cutters are 42 metres long hence the class name. The ships of this class are:

HMC Seeker

HMC Seeker in Belfast Lough in 2009
Attribution: Albert Bridge, Wikimedia Commons
The oldest cutter in current service Seeker was built in 2001 for what was then HM Customs & Excise later HM Revenue & Customs whose fleet was later absorbed into the UK Border Agency in 2008 which in turn gave way to Border Force in 2013.
As such she has sailed under at least three variants of the blue ensign and had three different prefixes before her name; HMRC "Her Majesty's Revenue Cutter" HMCC "Her Majesty's Customs Cutter" and latterly simply HMC. Seeker was one of two Border Force ships sent to the Mediterranean to take part in Operation Triton.

HMC Searcher in Weymouth in 2016
Attribution: Richard Symonds, Wikimedia Commons

HMC Searcher 

Built in 2002 for what was then HM Customs & Excise which became HM Revenue & Customs in 2005 and transferred to the Border Agency in 2008. This fleet was inherited by Border Force when the former was dissolved in 2013. Like her sister Searcher has had the same changes of prefix, colours and livery.

HMC Vigilant

HMC Vigilant outside Weymouth
Attribution: Brian Burnell, Wikimedia Commons
Vigilant is the latest of a number of vessels of British revenue services to bear the name. The first HMRC Vigilant being built in 1901 followed followed in 1921 when the former HMS Esther was acquired and renamed, This vessel was the sole official customs cutter in service in UK waters in the 1920s. The last Vigilant before this bearer of the name was acquired in 1947 and like her processor was a former warship, HMS Benbecula and has the distinction of having the first ever live outside TV broadcast from a ship being made on her in 1950. 
The current Vigilant was built in 2004 for HM Customs & Excise and has the same history as her class sisters.

HMC Valiant

HMC Valiant entering Malta's Grand Harbour in March 2018
Attribution: Estormiz, Wikimedia Commons
 Launched in 2004 Valiant is the last ships of the UKBF 42m Customs Cutter class to be built. The ships history mirrors that of her classmates but has the distinction of conducting the single largest seizure of Class A Drugs in the United Kingdom. this happened on 23rd April 2015 when along with the HMS Somerset she intercepted the Tanzanian flagged tug 'Hamal' in the North Sea 100 miles off Aberdeen, and seized over three tones of cocaine.

Telkka Class Cutter

Border Force operates one vessel of this class and that is the HMC Protector. Protector originally named Tavi was built in 2002 for the Finnish Border Guard. She served the Finnish until 2013 when she was acquired by the British Border Force to replace the ageing HMC Sentinel which was withdrawn from service. She was commissioned and named HMC Protector in 2014 as this Home Office video shows:

Protector along with Seeker were deployed on Operation Triton in 2015 helping rescue 1650 refuges. 

20m RIB Coastal Patrol Vessel

Current stats show that Border Force operates around six 20 metre RIBs these smaller vessels are not designed to stay at sea like the larger cutters but operate out of smaller ports and harbours of which the British coast has many. There are eight vessels of this class were acquired post 2015 and bought from BP suggesting their purchase was in response to a shortage of small vessels with the ability to respond to upsurge of migrants attempting to enter UK illegally by crossing the English channel in small boats. Information is not readily available on all these vessels but we know through vessels appearing on marinetraffic.com and names mentioned in news reports that there are atleast six named vessels. There are Her Majesty's Coastal Patrol Vessels Active, Alert, Eagle, Nimrod, Hunter and Speedwell. All were built by Holyhead Marine. Information available on the following vessels: 

HMCPV Active

Built in 2006 she saw service with BP as a rescue boat operating in conjunction with a larger offshore support vessel. She was initially named 'David' and was acquired by Border Force in 2016

HMCPV Eagle

HMCPV Nimrod  in Underfall Yard Britol
Attribution: Keir Gravil, Wikimedia Commons

Eagle originally named Ian was an autonomous Rescue and Recovery craft opertated by BP. Built in 2006 she supported BP projects in the North Sea. She operated as a daughter vessel of a larger offshore support vessel acting as mother ship. Acquired by Border Force and renamed Eagle in 2016.

HMCPV Nimrod

Nimrod was originally named Euan and like her sisters was one eight rescue boats bought from BP. She entered service in with Border Force in 2016.

High Speed Craft

BF Hurricane entering Dover Harbour
Credit: J-Peg/FleetMon
Very recently it appears the Border Force have acquired a catamaran vessel, with pictures of the BF Hurricane appearing on news websites. BF Hurricane appears to have been acquired to assist in the influx of migrants attempting to enter the UK illegally by crossing the English Channel. It was one of two 25m vessels built by Aluminium Marine Consultants for the marine engineering firm CWind. Originally chartered for four years to the energy company Vattenfall under the name Hurricane Tow it is unclear if Border Force has purchased the vessel outright or is simply chartering it from CWind for the upsurge of illegal channel crossings in the Summer of 2021

Tuesday, 26 February 2019

America re-adopts the Union Jack

The Union Jack of the United State of America
I admit that the title is a bit of click bait, for two reasons; by America I mean the US Navy and when I say re adopt, it never actually unadopted it completely.
The flag in question is not the national flag of the United Kingdom but rather one of the Jacks (flag flown from a jack staff on the bow of a ship) of the United States.
The US Navy has this month released NAVADMIN 039/19 which has ordered all ships (with on or two unique exceptions) to cease using the "First Navy Jack" and replace it with the Union Jack.
The order states
"This NAVADMIN directs the display of the Union Jack in lieu of the First
Navy Jack aboard Navy ships and craft. All U.S. Navy ships shall display the
Union Jack in accordance with section 1259 of reference (a) beginning at
morning colors on Tuesday, 4 June 2019. Reference (b) will be updated to
reflect this change."
This flag is in basically the canton of the USA flag used as a flag in its own right. Its a blue flag bearing 50 white stars. Versions of this flag with the appropriate number of stars have been used for most of the USN's history. The date being the anniversary of the battle of Midway in the Second World War.
The Jack currently in use at time of writing by commissioned USN ships is called the First Navy Jack. This is a flag of thirteen alternating red and white stripes on which is emblazoned a rattle snake below which is the text "DON'T TREAD ON ME" This flag was actually first introduced in 1975 for the Bicentenary of the USN. Despite its name it was not the first jack of the USN (although similar but different flags were used by the colonial and continental naval forces in the revolutionary war). It was adopted as the Jack of the US Navy on September 11th 2002 to signal the war on terrorism and used ever since.
The 'First Navy Jack' of the United States Navy

However only commissioned ships of the USN adopted the First Navy Jack, non commissioned support and axillary vessel continued to use the Union Jack, as did ships of the US Coast Guard and the National Oceanic and Atmospheric Administration.
No doubt some might like the so called First Navy Jack, it is not a historical flag and was invented as a temporary commemorative flag, and while some might see this reversion to the Union Jack as a symbolic end to the War on Terror, however I see it as a the USN readopting it's traditional flag.
The First Navy Jack will not disappear completely however as the USS Constitution (the oldest commissioned warship afloat) and USS Blue Ridge (which is I think the oldest commissioned US warship in active service) will continue to use it, and I believe this order does not affect uniform patches (at least not immediately). 

Tuesday, 31 May 2016

National Museum of the Royal Navy

This idea came to me after watching a BBC documentary about the restoration of HMS Caroline, which is a veteran of the 1st World War and currently being turned into a floating museum in Belfast's Titanic Quarter. Currently owned by the National Museum of the Royal Navy, seeing the shots of the ship it struck me that no flags were flying. In stark contrast to this 2006 photo from Wikipeadia which show Caroline in her glory;
When this photo was taken Caroline was still technically a serving warship! Although she hadn't put to sea since about 1930, she was used as a training ship and base for the Northern Ireland Royal Naval Reserve. (You may notice in this picture the flag of a Commodore of the Naval Reserve is flying from the mast). She was formally decommissioned about two years ago so no longer being a warship it would be inappropriate to continue to fly the white ensign and Union Jack. I am sure this is a situation found across most of the vessels owned by the National Museum of the Royal Navy across the country. Although some (including HMS Caroline I think) might be entitled to use the National Historic Fleet ensign, i though perhaps the National Museum of the Royal Navy should have its own ensign. This is my proposal:

A blue ensign as the National Museum is a public body. The badge in the fly features a shield with a Union Jack chief, with the cross of St George in the rest of the field. This is inspired by the White ensign, the national flag flown by British navy ships. It is of course topped by a Naval coronet/crown. 
A flag variant of the shield could be used as a jack:

The initials of the National Museum of the Royal Navy are on the white field. Although in the case of a jack the civil jack would probably be more appropriate as this is in effect the naval jack (Union Jack) with a white boarder. A variant of the ensign with letters:


Friday, 15 January 2016

Development & History of Irish Flags Pt16: Military flags of 20th & 21st Centuries Post2 RoI

Defence Forces colours on parade
Continuing on from Part 8Part 13and Part 14 and post 1 we look at military flags of the modern era. post will focus on the development of the colours and flags of the Irish regiments of the United Kingdom of Great Britain and Northern Ireland and of the Irish Defence Forces of the Republic of Ireland. The 20th Century was one of the most important and bloody in Irish History, the effects and feelings still very much felt today. Post 2 will look at the flags used by the military of the Republic of Ireland known as the Defence Forces. 

Defence Forces of the Republic of Ireland

The Defence Forces Cap Badge

The cap badge of the Irish Defence Forces is worn by all branches and on all uniforms. It is the oldest symbol of the organisation. It was originally designed Professor Eoin MacNeil for the Irish Volunteer Force and adopted in 1914 by the IVF. 
It consists of the letters "FF" inside an ancient warriors belt surrounded by sunburst and placed on a star. The "FF" stands for Fianna Fáil which loosely translates to warriors of destiny. The word Fianna coming from the celtic warrior tribe of ancient Irish mythology. It predates the political party Fianna Fáil which was founded in 1926. The wording on the belt "Óglaigh na h-Éireann" means soldiers of Ireland. The sunburst being a symbol of the Victorian Fenians and adopted by the IVF as seen in Part 12. The star has no official symbolism and is merely decorative. Upon independence the Free State army many of whom had been in the IVF adopted this as their cap badge, and it has been used ever since. 

Early flags

Railway Protection, Repair & Maintenance Corps flag of 1923,
the first recorded flag of the Irish Defence Forces
Unlike the Irish Volunteer Force whom the Defence Forces claim they originate, the Irish army was slow at adopting military colours of any description, which is contrary to the IVF who were quick to establish a committee and lay down a standard design of unit colours, perhaps recognizing that symbolism for them was as important a weapon as a firearm. In fact only one unit appears to have adopted a flag during the Civil War (at which time the army was more than 50,000 strong) seems to have been the Railway Protection, Repair and Maintenance Corps. This was the first of a handful of flags, which lacking official colours and standard regulation in regard to them, army units adopted themselves and it tells. This flag was blue poplin with a gilt fringe and blank on one side. On the other a shamrock was in each corner, and a gold army badge with green lettering was in the centre, around which was the unit's name (in English) in couched metal thread. Although it could be argued that their were more pressing issues in the Civil War, these didn't exist in the peace between it and the Emergency that corresponded with second continental war in Europe in the 1940s. Infact a lot of attention was made on a couple of occasions to restyling the uniform, badges and insignias of the Permanent Defence Force as it was then called. But despite this very little attention was paid to flags or colours. 

The forgotten flags

In 1931 arrangements do appear to have been made to issue battalion colours, and at least three flags were made, however they were never issued to any battalion. 
The three flags in question were locked away in storage until they were rediscovered in 1954, and issued as the colours of the 1st, 2nd and 4th Brigades. These flags were of an extremely elaborate uniformed pattern. They were blue flags with gold fringe and rope. Across the of the field in green, gold and light blue was a Celtic decoration, This form of pattern being seen as something uniquely Irish in the 1930s, despite the fact that Ireland was not the only Celtic nation. In the same style of pattern a triangular pattern possibly representing a spear head was placed in the middle. The tip overlay the pattern at the top, and stretched towards the corners towards the bottom. Near the top of this "spear head" was the badge of the Defence Forces. Below the badge each flag had a different piece of embroidered artwork depict historic Irish battles, possibly alluding to the military establishment trying to link themselves to the warriors of the past despite having no real organisational linage to them, possibly to give the military more legitimacy or to inspire it's soldiers or both. 
Example of the rather over the top flags made in 1931,
but not issued until 1954!
The first flag depicted Hugh O'Neil Earl of Tyrone fighting Palesman Segrave at the battle of Clontibret 1595, complete with red hand. Above this was the Gaelic inscription "Lamh dearg abu" (Up the red hand). Below was the inscription "Cluain Tiobrad 1595" (Clontibret 1595) The second flag depicted an Irish warrior taking the raven flag of the Vikings at the battle of Clontarf in 1014, an event which may not have even happened. Above was the inscription "Badh sonairt ar n-airle" (let our will be firm) and below " Cluain Tarbh 1014" (Clontarf 1014). The final flag depicted an event from the 1691 siege of Athlone, In which a Jacobite soldier; Sgt Custume  led a small handful of men to defend the bridge into the city. Above is the inscription "Conoirg uathath fri sochaide" (the few prevailing over many) and below "Atha Luain" (Athlone). 
These flags are magnificent pieces of art in their own right, however they are not the stuff of military colours, and are more reminiscent of an indoor tapestry rather than an outdoor flag. Set aside the fact that they are hugely complicated they bear no identifying marks or insignia for the unit they belong to. 

Corps & Pennants

Corps flags

Since the end of the Civil War the Defence Forces have had a tradition of colour coding flashes and insignia from rank insignia to unit flashes. Many of the services had formalised service colours (colour here is literal and not referring to a flag) and badges that were worn on uniform collars. Many individual units used their own unofficial insignia. In 1942 the services were rebranded "corps" and in 1944 the Adjunct General confirmed all badges and insignia brought into use during and before the Emergency (WW2).  Each corps adopted its own unofficial non ceremonial flag, this consisted of the corps badge on the appropriate coloured field. The corps flags are as follows:
The Infantry Corps has a purple field with the corps insignia in the centre which consist of two crossed rifles below which is the word "infantry" in Gaelic:





The Ordnance Corps consists of a crimson flag, with a purple shield bearing the corps insignia which is an ancient shield, flanked by weapons such as spears, axes and cannons.




The Cavalry Corps flag is a black flag with gold border. In the centre is the corps badge, which is a rather badass looking breastplate on top of a crossed sword and rifle, behind which is what appears to be a round shield, flanked by a wreath, with the corps name in Gaelic.


The Engineers Corps flag is a  yellow flag with the corps badge in the centre, which is a crescent shape at the bottom with the corps name in Gaelic, Out of this a theodolite is protruding. 



The Communications and Information Services Corps (formally the Corps of Signals) use a blue flag with the corps insignia, which features an angel supporting a shield bearing an atom. 




The Artillery Corps flag is orange with a white boarder. The corps badge in the centre. The Corp badge which is clearly inspired by the Royal Artillery Badge of the British Army, features a cannon and gunnery equipment, upon which the personification of Erin is seated with her harp. Below is a scroll bearing the corps name in Gaelic. 

The Medical Corps flag is a teal coloured flag with a white boarder. In the centre is the corps badge is a crest of a yellow hand (similar to that on the Royal College of Surgeons coat of arms) flanked by two Rods of Ascleplus. Above which is the Army's title "Óglaigh na h-Éireann" and below the corps' name in Gaelic.


Company Pennants

Flag of the 2nd Infantry Battalion (disbanded)
2nd (Eastern) Brigade 
The Defence Forces never issued colours for battalion sized units but many unofficial unit colours were adopted and used, although recently the military command has clamped down on such flags. These unofficial flags came in all shapes and sizes, some had the unit shoulder patch in the centre, others had the corps insignia with the unit number above, some even displayed the brigade shield.
 Company sized units do carry pennants. These are official flags that must conform to a standard pattern that hasn't changed since the Emergency. These flags don't really have any ceremonial or symbolic significance, but they are consecrated. These flags are similar to the Company Colours already mentioned in post 1. They are also amongst other things carried by the right hand person in the front rank for forming up purposes. They are carried over the shoulder on a 1.98m half pike made of ash. The standard design is the almost the same as the corps flags mentioned above, in that the insignia and field colour are the same. However the battalion number is embroidered above and the company letter/number below the corps insignia. The shape of the pennant itself is also dependant on the corps. Infantry pennants are a triangle shape, Artillery are a bugree shape and cavalry use a swallow tailed pennant. 
Cavalry, infantry, artillery and engineers company pennants on parade in Cork on St Patrick's Day



Defence Forces Training Units

the colours of the training units for officers
& enlisted ranks 
In 1954 a colour probably for pass out parades was authorised for the Cadet School, responsibil for the training of officers. This was a blue flag bearing a golden sunburst and an officer's sword pointing upwards towards the motto "the road ahead of me" in Gaelic which is a quotation from the 1916 Easter rebel Patrick Pearse. 
This would eventually be followed by the Defence Forces Training Centre, who's rather plain flag is also blue, with the cap badge in the canton. In the centre is the centre's insignia of a red shield with a gold oak leaf, below which is the unit's name in Gaelic. 

Service & Brigade Colours

In 1964 a decision was eventually taken to establish a uniformed set of six colours, one for each of the brigades (the Defence Forces had six brigades compared to the current strength of two). The designs were drawn up and the first was ready by Easter 1966. These flags can be used both in a colour party with the national flag and independently.  Two Brigades each were assigned to the Southern, Eastern and Western Commands, and the flags featured the colours of the command on the field which was divided either vertically or per bend diagonally. The Southern Command (1st & 3rd Brigades) are coloured blue and yellow. The Eastern Command (2nd & 6th Brigades) are blue and green, and the Western command (4th & 5th Brigades) were blue and white. These were not coincidently the colours used on the provincial flags which each command mainly covered. The defence forces cap badge is in the canton and the brigade number is in the lower fly. A heraldic insignia unique to the brigade occupies the centre of the flag.  

Southern Command

Examples of Brigade colours
from each 1964 Command
  • 1st Brigade - the field is divided per bend/diagonally, yellow above blue. The centrepiece is a stylised bow of a ship encircled by an antique crown the colour of which is counter changed with yellow and blue. This image is a combination of symbols from the arms of Munster and the city of Cork.
  • 3rd Brigade - the field is divided the same way as the 1st Brigade but with blue above yellow. The central image is a white tower encircled by a crown with the colours counterchanged like the 1st Brigade flag. A green flag flies from the tower and a crossed rifle and spear overlie the rest of the device.

Eastern Command

  • 2nd Brigade - the field is divided vertically in the centre between green and blue. The centerpiece depicts a rising sun with a flaming tower and Irish harp superimposed on it. The sun is the sunburst symbol of various earlier Republican groups including the Fenians and Irish Volunteer Force. Tower is from the arms of Dublin City and the harp no doubt represents Leinster. 
  • 6th Brigade - The field same as above but with the blue and green the other way around. The centre device depicting a white cross in a red circle (the symbol of the Catholic Confederation of the 1640s) combined with the representation of a pike head. The intention to show military symbols of the Kilkenny - Wexford - Waterford area. 

Western Command

  • 4th Brigade - the field divided vertically down the centre, blue and white. The centre piece shows a symbol of a black eagle, partly dimidated so that the left side depicts a hand holding a dagger. The eagle is holding a furze branch in it's talon. A representation of a broken bridge in red is on the eagle's breast. The eagle/dagger hand are the arms of the province of Connacht. The bridge is that from the Battle of Athlone in 1691 and the furze symbolising the Irish midlands. 
  • 5th Brigade- The field divided as the 4th Brigade but with the colours reversed. The centre badge also depicts the Connacht eagle superimposed with a combination of white crosslets (from the arms of the O'Donnells) the Furze branch is omitted. 
Revisions in Defence strategy and the overall strength and structure of the Defence Forces have led to a reduction to three Brigades and then two (the Western command being disbanded in 2012 for finance reasons) meant that many of the colours have been laid up, however the 1st and 2nd Brigade colours are still in use by the army. 

Naval Service & Air Corps

Irish military and state vessels had flown the tricolour as their national ensign since the creation of the state. A small marine arm was successfully used in the civil war, although it was disbanded after (under the terms of the Anglo-Irish Treaty the Royal Navy policed Irish waters and maintained a base at Cork until the new constitution of 1937, and in 1938 fisheries protection was carried out by vessels of the Department of Agriculture & Fisheries) although a "Marine Service" was established in WW2 which laid the foundations for a permanent Navy. The Naval Service succeed the Marine Service in 1946 immediately adopting the national flag as the naval ensign. It's ships are given the abbreviation 'LE' for Long Eireannach (Irish Vessel) before their names.  In 1947 the historic green harp flag was adopted as the Navy Jack. This is a secondary flag flown at the bow of a ship (the jackstaff) and used to represent the nation alongside the ensign. It is flown when the vessel is at anchor, moored, alongside or underway when "dressed." Why the green harp flag was adopted over others I am unsure, perhaps because it's arguably seen as Ireland's second national flag or perhaps it's history or both. A masthead pennant was also introduced. This is a long white flag with a blue field in the hoist bearing a harp. It is used whenever a vessel is in commission (most of its life with the Defence Forces) and may have also been used by the Marine Service in 1939. 

In 1996 the Naval Service was issued with a ceremonial colour for use by honor guards at commemorative and ceremonial events like state visits.  This is a double sided flag. The colour on both sides is navy blue with a gold border, the obverse bears the Defence Forces badge superimposed over two crossed anchors. The reverse features the state harp in a rope circle below which is the name Naval Service in Gaelic.
The Air Corps was also given a a ceremonial flag. This composed of red and yellow diagonal stripes with the emblem of the corps in the centre, In the canton is the Defence Forces badge in the lower fly is the aircraft roundel.
 
colours of the Naval Service and Air Corps
Strictly speaking aircraft roundels probably shouldn't appear in this series, but they are the flags of the air and I feel deserve a brief mention. The Irish Air Corps have used a variety of roundels and markings over the years to identify their aircraft. The earliest ex-RAF aeroplanes were simply painted with the new national tricolour flag. In 1923 a standard roundle of the national colours had been adopted. This consisted of an orange dot, sounded by white and green rings. 
 This roundle was short lived and had been replaced by 1923, possibly not surprisingly because of its similarity to the roundel used on British military aircraft. The new markings consisted of green, white and orange stripes across the wings and on the rudder. By the outbreak of war in 1939 though a rather Korean Karma looking "Celtic Boss" insignia of green and orange was placed on the aircraft fuselage and on the tops of the wings (the stripes continued to be used below the wings), often in the centre of a white square on camouflage painted aircraft (Ireland used some makes of aeroplane used by the RAF and clearly didn't want misidentification) It was also decided to adopt a modern fin flash rather than just painting the rudder (although this still happened on some aircraft) this was still stripes of the national colours. In 1954 white was added to the "Celtic boss" so that it included the national colours, and a celtic trillium or airplane propeller depending on your viewpoint. This was adopted on both sides on the wings and the fuselage. A modern fin flash was also adopted, this was still stripes of green, white and orange however the size was often smaller and the proportions adjusted to better reflect the national flag.

The 2nd Cavalry Squadron (The Blue Hussars)

The 2nd Cavalry Squadron forms the Irish Presidential escort, also known as the Escort of Honor. The tradition of the escort goes back to 1931 when horse mounted soldiers were organised into a special state escort for VIPs. They were known as the Blue Hussars due to the style and colour of their ceremonial uniforms. In 1949 Cavalry Corps motor cyclists replaced the colourful mounted soldiers however the nickname stuck and certain references to the original Blue Hussars are reflected in the uniform and in the colour of some of the motorbikes of the 2nd Cavalry Squadron. All the bikes in the escort fly a flag or pennant. The officer leading the escort flies either the Presidential standard of Ireland or the relative national flag of the VIP, dignitary or visiting head of state being escorted. The escort commander and commander of the rear troop of the escort fly a burgee shaped with with the unit insignia. The rest of the escort fly black, red and green (Cavalry Corps colours) pennants from their bikes. 
2nd Cavalry escort note the corps colours of the pennants and unit insignia on the flag of the lead bike

Overseas flags

The Defence Forces occasionally send personnel overseas as part of United Nations or European Union missions, the first UN mission being sending observers to Lebanon in 1958. Traditionally a special unit is formed for overseas service consisting of personnel from all over the Defence Forces, this unit is presented with a special flag before deployment which is then laid up in Arbour Hill Church, the Defence Forces national chaple when the unit returns home. Historically these were green flags, the first had the badge of the infantry corps in a purple circle in the centre, above this was the battalion/mission number and the words "Irish Battalion" in gaelic around the central badge.
flag of the 89th Irish Battalion sent overseas
flag of the 32nd Irish battalion sent overseas with the UN or EU
Only about five or six of these flags were made before the design was changed to better reflect the Defence Forces as a whole. The design was still a green flag, but with a shield in the centre, above which was the number and below which was the words "Irish Battalion" in Gaelic. The shield consisted of seven quarters each bearing a unit insignia which were: The 1st Brigade (Spear), 2nd Brigade (bow and arrow?), 3rd Brigade (arm & dagger), Training centre (oak leaf), Naval Service (anchor), the Air Corps (winged roundel) and the Defence Forces HQ (sword). Infantry groups had the same design except the text read "Infantry Group" in Gaelic. 
Military Police and Transport companies had smaller flags similar in size to company pennants that were also green. The Military Police had three red and blue stripes diagonally in the canton. The number above the letters "PA" in red in the centre below which was the text "MP COY" on a blue tab. 
Transport companies flags were also green with two red and gold stripes running diagonally. In the centre was a winged wheel. The canton had "IRELAND" in gold lettering and the number and "TRANSPORT COMPANY" in the lower fly. The company sent as part of the international Kosovo Force was slightly different. It had the mission abbreviation "KFOR" in the canton and the text " Irish Component 1 Transport Company" in the lower fly. 
More recent missions overseas have see a slight break from green flags to purple. The Irish contingent sent as part of the United Nations Mission in Ethiopia and Eritrea had a purple flag with gold boarder. The Defence Forces cap badge was in the centre, and the Abbreviations "IRCON" in the canton and "UNMEE" in the lower fly. The Irish contingent of the United Nations Mission in East Timor had a purple flag with the infantry corps badge in the centre. In the canton was the abbreviation "IRCON" and "UNTAET" in the lower fly.