List of Irish state vessels

This list identifies active and former maritime vessels of the Irish state, both civilian and military. This list is incomplete.

Active

Geological Survey of Ireland

Name	Image	Type	Entered service	Displacement	Length	Notes
RV Keary		Near-shore hydrographic survey vessel	2009	36 t	15.5 m	Built by Veecraft Marine, South Africa
RV Geo		Shallow water survey vessel	2007		7.4 m	Redbay Stormforce RIB
RV Tonn		Shallow water survey vessel	2015		7.9 m	Cheetah Catamaran
RV Mallet		Inshore hydrographic research vessel			18 m
RV Lir		Shallow water survey vessel			11 m	Redbay Stormforce RIB
RV Galtee		Shallow water survey vessel			11 m	Redbay Stormforce RIB

Commissioners of Irish Lights

Name	Image	Type	Entered service	Displacement	Length	Notes
ILV Granuaile III		Multipurpose support vessel	2000	3903 t	80 m

Dublin Fire Brigade

Name	Image	Type	Entered service	Length	Notes
Rescue One		Redbay Stormforce RIB	2022	7.4 m	Search and rescue

Dublin Port

Name	Image	Type	Entered service	Displacement	Length	Notes
Shackleton		Harbour tug	2010		24 m	Built by Astilleros Zamakona
Beaufort		Harbour tug	2010		24 m	Built by Astilleros Zamakona

Inland Fisheries Ireland

Name	Image	Type	Entered service	Length	Notes
Delta 1 - 12		Delta 780HX RIB	2018	7.8 m	Fishery protection of rivers, lakes and coastal waters

Dublin City Council

Name	Image	Type	Entered service	Displacement	Length	Notes
		Three-masted barque	2002	518 t	47 m	A museum ship replica of the original 1847 ship. Docked at Custom House Quay

Former

Irish Naval Service

The following vessels have served with the Naval Service:

Name	Image	Type	No.	Service years	Fate	Notes
			01	1946–1970	Sold for scrap in 1970	Former
			02	1946–1972	Scrapped in 1972	Former
			03	1947–1970	Sold for scrap in 1970	Former
			CM10	1971–1987	Sold for scrap in 1987	Former HMS Oulston
			CM11	1971–1984	Sold for scrap in 1984	Former HMS Alverton
			CM12	1971–1987	Sold to a Spanish company for scrap in 1987	Former HMS Blaxton
		Offshore patrol vessel	P20	1972–2001	Scrapped in 2014	Prototype of the P20 class
		Auxiliary ship	A15	1976–1984	Sold for scrap in 1984	Former Irish Lights vessel Isolde
		Patrol vessel	A16	1977–1978	Chartered for one year	Former MFV Helen Basse
			P21	1978–2013	Acquired by Nigerian Navy in 2015	Modified version of LÉ Deirdre. Renamed NNS Prosperity
			P22	1979–2015	Donated to Maltese Navy in 2015	Modified version of LÉ Deirdre. Renamed P62 by Maltese
			P23	1980–2016	Acquired by Libyan National Army in 2018	Modified version of LÉ Deirdre. Renamed Al-Karama
		Helicopter patrol vessel	P31	1984–2022	Scrapped in 2024	Equipped with helicopter hangar and deck
		coastal patrol vessel	P41	1989–2022	Scrapped in 2024	Former HMS Swift
		coastal patrol vessel	P42	1989–2022	Scrapped in 2024	Former HMS Swallow

Marine and Coastwatching Service

The Marine and Coastwatching Service was a naval service that operated during The Emergency. In 1946, the service was integrated into the Defence Forces as the Naval Service and these ships were sold off.

Name	Image	Type	Service years	Fate	Notes
PV		Patrol vessel	1939–1947	Sold in January 1947 for scrap, but sank off Saltee Islands in May.	Launched in 1908 and served the Irish Free State from 1923 as an unarmed fisheries protection vessel. Later armed with a 12-pounder gun.
SS Fort Rannoch		Armed trawler	1939–1947	Sold in July 1947 to commercial service, and scrapped in 1963.	Leased by Department of Agriculture and Fisheries in 1937 for fisheries protection. Later armed with a 12-pounder gun.
SS Shark		Minelayer	1940–1948	Sold in 1948 and scrapped in 1952.	Built in 1891 as trawler, and later a salvage vessel.
Isallt		Sail training	1940–1945	Sold in 1945 and sank off Wicklow in December 1947.	A wooden three-masted schooner built in Wales in 1909.
M1		Motor Torpedo Boat	1940–1948	Sold between 1948–1950 to Colonel James Fitzmaurice	M1 and M2 were originally built for Estonia and Latvia respectively. Built by Thornycroft, they were 72 feet in length, displaced 32 tons, a crew of ten, and powered by Isotta-Fraschini engines giving a top speed of 40 knots. They were armed with two 18-inch torpedoes, a 0.303-inch Hotchkiss machine gun, and two depth charges. M4, M5, and M6 were slightly larger, powered by Rolls Royce engines with a lower speed of 28 knots, and replaced the Hotchkiss with a 20 mm Madsen cannon. Their small size meant that these boats were not suited to Atlantic waters.
M2		Motor Torpedo Boat	1940–1948	Sold between 1948–1950 to Colonel James Fitzmaurice	M1 and M2 were originally built for Estonia and Latvia respectively. Built by Thornycroft, they were 72 feet in length, displaced 32 tons, a crew of ten, and powered by Isotta-Fraschini engines giving a top speed of 40 knots. They were armed with two 18-inch torpedoes, a 0.303-inch Hotchkiss machine gun, and two depth charges. M4, M5, and M6 were slightly larger, powered by Rolls Royce engines with a lower speed of 28 knots, and replaced the Hotchkiss with a 20 mm Madsen cannon. Their small size meant that these boats were not suited to Atlantic waters.
M3		Motor Torpedo Boat	1940–1948	Sold between 1948–1950 to Colonel James Fitzmaurice	M1 and M2 were originally built for Estonia and Latvia respectively. Built by Thornycroft, they were 72 feet in length, displaced 32 tons, a crew of ten, and powered by Isotta-Fraschini engines giving a top speed of 40 knots. They were armed with two 18-inch torpedoes, a 0.303-inch Hotchkiss machine gun, and two depth charges. M4, M5, and M6 were slightly larger, powered by Rolls Royce engines with a lower speed of 28 knots, and replaced the Hotchkiss with a 20 mm Madsen cannon. Their small size meant that these boats were not suited to Atlantic waters.
M4		Motor Torpedo Boat	1942–1948	Sold between 1948–1950 to Colonel James Fitzmaurice	M1 and M2 were originally built for Estonia and Latvia respectively. Built by Thornycroft, they were 72 feet in length, displaced 32 tons, a crew of ten, and powered by Isotta-Fraschini engines giving a top speed of 40 knots. They were armed with two 18-inch torpedoes, a 0.303-inch Hotchkiss machine gun, and two depth charges. M4, M5, and M6 were slightly larger, powered by Rolls Royce engines with a lower speed of 28 knots, and replaced the Hotchkiss with a 20 mm Madsen cannon. Their small size meant that these boats were not suited to Atlantic waters.
M5		Motor Torpedo Boat	1942–1948	Sold between 1948–1950 to Colonel James Fitzmaurice	M1 and M2 were originally built for Estonia and Latvia respectively. Built by Thornycroft, they were 72 feet in length, displaced 32 tons, a crew of ten, and powered by Isotta-Fraschini engines giving a top speed of 40 knots. They were armed with two 18-inch torpedoes, a 0.303-inch Hotchkiss machine gun, and two depth charges. M4, M5, and M6 were slightly larger, powered by Rolls Royce engines with a lower speed of 28 knots, and replaced the Hotchkiss with a 20 mm Madsen cannon. Their small size meant that these boats were not suited to Atlantic waters.
M6		Motor Torpedo Boat	1943–1948	Sold between 1948–1950 to Colonel James Fitzmaurice	M1 and M2 were originally built for Estonia and Latvia respectively. Built by Thornycroft, they were 72 feet in length, displaced 32 tons, a crew of ten, and powered by Isotta-Fraschini engines giving a top speed of 40 knots. They were armed with two 18-inch torpedoes, a 0.303-inch Hotchkiss machine gun, and two depth charges. M4, M5, and M6 were slightly larger, powered by Rolls Royce engines with a lower speed of 28 knots, and replaced the Hotchkiss with a 20 mm Madsen cannon. Their small size meant that these boats were not suited to Atlantic waters.

Coastal and Marine Service

The Coastal and Marine Service was a short-lived naval service that operated during The Irish Civil War. The Service was disbanded in March 1924 after only several months of existence, and all of its ships, except Muirchú, were sold off.

Name	Image	Type	Notes
SS Dainty		Salvage tug/Patrol sloop	STOIC-class tug built in Chepstow in 1918 for the Admiralty. She had a length of 142 feet, displaced 459 GRT, and armed with a 12-pounder gun. Sold to French interests, renamed SS Cherbourgeois.
PV		Patrol vessel	Launched in 1908 as HMY Helga. Armed with a 12-pounder gun. Disarmed and transferred to Department of Agriculture and Fisheries for fisheries protection.
John Dunn			The Mersey trawlers were a class of over 100 naval trawlers built for the Royal Navy during World War I. The trawlers were 148 feet in length, displaced 438 long tons, a crew of 15, a speed of 11 knots, and armed with a 12-pounder gun.
John Dutton			The Mersey trawlers were a class of over 100 naval trawlers built for the Royal Navy during World War I. The trawlers were 148 feet in length, displaced 438 long tons, a crew of 15, a speed of 11 knots, and armed with a 12-pounder gun.
William Honnor			The Mersey trawlers were a class of over 100 naval trawlers built for the Royal Navy during World War I. The trawlers were 148 feet in length, displaced 438 long tons, a crew of 15, a speed of 11 knots, and armed with a 12-pounder gun.
Robert Murray			The Mersey trawlers were a class of over 100 naval trawlers built for the Royal Navy during World War I. The trawlers were 148 feet in length, displaced 438 long tons, a crew of 15, a speed of 11 knots, and armed with a 12-pounder gun.
Thomas Thresher			The Mersey trawlers were a class of over 100 naval trawlers built for the Royal Navy during World War I. The trawlers were 148 feet in length, displaced 438 long tons, a crew of 15, a speed of 11 knots, and armed with a 12-pounder gun.
Christopher Dixon			The Mersey trawlers were a class of over 100 naval trawlers built for the Royal Navy during World War I. The trawlers were 148 feet in length, displaced 438 long tons, a crew of 15, a speed of 11 knots, and armed with a 12-pounder gun.
TR.24		TR series trawler	The TR trawlers were a Canadian version of the built by Canadian Vickers, Montreal during World War I. The trawlers were 133 feet 10 inches in length, displaced 275 long tons, a crew of 15, a speed of 10 knots, and armed with a 12-pounder gun.
TR.25		TR series trawler	The TR trawlers were a Canadian version of the built by Canadian Vickers, Montreal during World War I. The trawlers were 133 feet 10 inches in length, displaced 275 long tons, a crew of 15, a speed of 10 knots, and armed with a 12-pounder gun.
TR.27		TR series trawler	The TR trawlers were a Canadian version of the built by Canadian Vickers, Montreal during World War I. The trawlers were 133 feet 10 inches in length, displaced 275 long tons, a crew of 15, a speed of 10 knots, and armed with a 12-pounder gun.
TR.29		TR series trawler	The TR trawlers were a Canadian version of the built by Canadian Vickers, Montreal during World War I. The trawlers were 133 feet 10 inches in length, displaced 275 long tons, a crew of 15, a speed of 10 knots, and armed with a 12-pounder gun.
TR.30		TR series trawler	The TR trawlers were a Canadian version of the built by Canadian Vickers, Montreal during World War I. The trawlers were 133 feet 10 inches in length, displaced 275 long tons, a crew of 15, a speed of 10 knots, and armed with a 12-pounder gun.
TR.31		TR series trawler	The TR trawlers were a Canadian version of the built by Canadian Vickers, Montreal during World War I. The trawlers were 133 feet 10 inches in length, displaced 275 long tons, a crew of 15, a speed of 10 knots, and armed with a 12-pounder gun.
Inishirrer		Drifter	Built in Arklow in 1913, she was 65 feet in length and was assessed at 51 GRT. Acquired from Congested Districts Board in August 1922. Armed with machine guns
John S Summers		Drifter	Built in Lowestoft in 1910, she was 77 feet length and assessed at 62 GRT. Was hired by Royal Navy as a net vessel during World War I. Armed with machine guns
ML1		Motor Launch	Four ELCO motor launches were acquired in May 1922 for the Marine Investigations Department. ML2 sank off Cornwall in July 1922 while being delivered. The launches were 80 feet in length, with a displacement of 37 long tons, a crew of 8, a speed of 19 knots, and armed with a 3-pounder gun.
ML2		Motor Launch	Four ELCO motor launches were acquired in May 1922 for the Marine Investigations Department. ML2 sank off Cornwall in July 1922 while being delivered. The launches were 80 feet in length, with a displacement of 37 long tons, a crew of 8, a speed of 19 knots, and armed with a 3-pounder gun.
ML3		Motor Launch	Four ELCO motor launches were acquired in May 1922 for the Marine Investigations Department. ML2 sank off Cornwall in July 1922 while being delivered. The launches were 80 feet in length, with a displacement of 37 long tons, a crew of 8, a speed of 19 knots, and armed with a 3-pounder gun.
ML4		Motor Launch	Four ELCO motor launches were acquired in May 1922 for the Marine Investigations Department. ML2 sank off Cornwall in July 1922 while being delivered. The launches were 80 feet in length, with a displacement of 37 long tons, a crew of 8, a speed of 19 knots, and armed with a 3-pounder gun.
190		Steam pinnace	A pinnace is a type of ship's boat. They were 50 feet in length, displaced 14.4 long tons, a speed of 12 knots, and armed with machine guns.
199		Steam pinnace	A pinnace is a type of ship's boat. They were 50 feet in length, displaced 14.4 long tons, a speed of 12 knots, and armed with machine guns.

There were also five unnamed patrol boats of unknown type used for river patrol.