The Republic Naval Service is divided into Four sub-branches, the Republic Navy, the Republic Naval Air Service and the Republic Corps of Marines and it's Marine Air Service. The professional head of the Naval Service is the First Admiral who is an admiral and member of the Defence Council of the Republic. The Defence Council delegates management of the Naval Service to the Admiralty Board, chaired by the Secretary of State for Defence. The Republic Navy operates from four primary bases where commissioned ships and it's small fleet of submarines are based: RNB Yarlford, RNB Haedleigh and RNB Taedmorden and the Auxiliary Fleet base at RNB Treharne, with Yarlford being the largest operational naval base as well as two naval air stations, RNAS Drakeweald and RNAS Redwater where maritime aircraft are based.
Due to the strong Maritime Tradition and relative security of it's landward borders, the Republic Navy receives by far the majority of the overall defence spending allocated by the annual budget. It is for this reason that the RN has focused on a strategy of modernization of it's fleet for the past 30 years.
| | | Surface Fleet | | | |
| | | Aircraft Carriers | | | | |
Class | Ship | Pennant No. | Commissioned | Displacement | Type | Home Base | Photo |
Clíodhna-Class | RNS Oilliphéist RNS Ddraig Goch | CV-46 CV-45 | 1996 1995 | 64500 | Aircraft Carrier | RNB Yarlford RNB Taedmorden |  |
| | | Amphibious warfare | | | | |
Class | Ship | Pennant No. | Commissioned | Displacement | Type | Home Base | Photo |
Trwyth-Class | RNS Annwn RNS Gwlychwr RNS Sarff | L-39 L-40 L-41 | 2005 2006 2006 | 21,500 | Landing Platform Helicopter | RNB Yarlford RNB Taedmorden RNB Taedmorden |  |
Crehyr-Class | RNS Sgadan RNS Penwaig | L-25 L-26
| 1996 1996
| 19,750 | Landing Platform Helicopter | RNB Haedleigh RNB Haedleigh
|  |
Prydain-Class | RNS Cawr RNS Mynydd RNS Carbad RNS Iau | L-30 L-31 L-32 L-34 | 1992 1992 1993 1993 | 22,170 | Landing Platform Dock | RNB Yarlford RNB Yarlford RNB Haedleigh RNB Taedmorden |  |
| | | Fleet | | | | |
Class | Ship | Pennant No. | Commissioned | Displacement | Type | Home Base | Photo |
Arswydus-Class | RNS Dungannon RNS Caerfyrddin | BC-1 BC-2
| 2017 2018 | 49,150 | Heavy guided-missile Battlecruiser | RNB Yarlford RNB Taedmorden
|  |
Gweriniaeth-Class | RNS Gwydion RNS Dygnwch RNS Draig RNS Rhyfelwr RNS Gyffes RNS Caledfwlch
| CL-11 CL-12 CL-13 CL-14 CL-15 CL-16
| 1999 2000 2000 2000 2000 2001 | 15,650 | Guided Missile Cruiser | RNB Yarlford RNB Taedmorden RNB Haedleigh RNB Yarlford RNB Haedleigh RNB Haedleigh |  |
Beiddgar-Class | RNS Amddiffynnwr RNS Gwarcheidwad RNS Ymchwydd RNS Cyfri RNS Taran RNS Rhos RNS Comiwnydd | D-81 D-82 D-83 D-84 D-85 D-86 D-87 | 2015 2015 2015 2016 2016 2016 2016
| 12,550 | Guided missile Destroyer | RNB Taedmorden RNB Haedleigh RNB Yarlford RNB Taedmorden RNB Yarlford RNB Taedmorden RNB Haedleigh |  |
Dealanach-Class | RNS Dealanach RNS Doineann RNS Corwynt RNS Dân RNS Bhaile-Mòr RNS Comhairle RNS Cyngor RNS Dorlan RNS Uachdaran RNS Arglwydd RNS Cogaidh RNS Geàrd | D-42 D-43 D-44 D-45 D-46 D-50 D-51 D-52 D-53 D-54 D-55 D-56 | 1998 1998 1998 1998 1999 1999 1999 1999 1999 2000 2000 2000
| 13,250 | Guided missile Destroyer | RNB Taedmorden RNB Haedleigh RNB Yarlford RNB Yarlford RNB Yarlford RNB Taedmorden RNB Haedleigh RNB Yarlford RNB Taedmorden RNB Haedleigh RNB Yarlford RNB Taedmorden
|  |
Dìonadair-Class | RNS Dìonadair RNS Amddiffynnydd RNS Pencampwr RNS Enillydd RNS Gorchfygwr RNS Arwr RNS Gaisgeach RNS Gwyllt RNS Fiadhaich RNS Crefft RNS Ymlid RNS Tòir
| F-300 F-301 F-302 F-303 F-304 F-305 F-306 F-315 F-316 F-317 F-318 F-319 | 2010 2010 2010 2010 2011 2011 2011 2019 2019 2019 2019 2019
| 7,550 | Guided missile Frigate | RNB Taedmorden RNB Haedleigh RNB Haedleigh RNB Yarlford RNB Taedmorden RNB Haedleigh RNB Yarlford RNB Yarlford RNB Taedmorden RNB Haedleigh RNB Yarlford RNB Taedmorden
|  |
Dagda-Class | RNS Arglwydd RNS Tymhestl RNS Corwynt RNS Afon RNS Castell RNS Caer RNS Saethwr RNS Ceidwad RNS Ymlidiwr RNS Gwefrydd RNS Ghàidheal RNS Geàrd RNS Tracadh RNS Bogha RNS Saethyddion RNS Consuriwr RNS Tuiteam
| F-148 F-149 F-150 F-151 F-170 F-171 F-172 F-201 F-202 F-222 F-223 F-224 F-225 F-226 F-227 F-228 F-229 | 1996 1992 1992 1992 1992 1995 1995 1995 1995 1996 1996 1996 1996 1996 1996 1996 1996
| 8,800 | Guided missile frigate | RNB Yarlford RNB Taedmorden RNB Haedleigh RNB Taedmorden RNB Yarlford RNB Taedmorden RNB Yarlford RNB Taedmorden RNB Taedmorden RNB Yarlford RNB Taedmorden RNB Haedleigh RNB Haedleigh RNB Haedleigh RNB Haedleigh RNB Yarlford RNB Yarlford |  |
| | | Offshore Patrol | | | | |
Gwaywffon-Class | RNS Halfair RNS Vilgur RNS Saighrna RNS Svorhir RNS Ceannairc RNS lladd RNS Marbhadh RNS Bùidsear RNS Claidheam | C-03 C-04 C-05 C-06 C-07 C-08 C-09 C-10 C-11 | 2002 2002 2002 2003 2004 2004 2004 2005 2005 | 2,200 | Corvette | RNB Haedleigh RNB Yarlford RNB Yarlford RNB Taedmorden RNB Taedmorden RNB Taedmorden RNB Yarlford RNB Taedmorden RNB Haedleigh |  |
Class | Ship | Pennant No. | Commissioned | Displacement | Type | Home Base | Photo |
Sealgair-Class | RNS Dolffin RNS Ionnsaigh RNS Tighearna RNS Meirleach RNS Neidr RNS Madadh RNS Lorgaire RNS Cleddyf RNS Pysgotwr RNS Enweiriwr RNS Genweiriwr RNS Poidsear RNS Herwheliwr RNS Mhotsiar
| P-02 P-03 P-04 P-05 P-06 P-10 P-11 P-15 P-16 P-17 P-18 P-19 P-20 P-21 | 1995 1995 1995 1995 1995 1998 1998 2001 2001 2001 2001 2002 2002 2002 | 1,780 | Offshore Patrol | RNB Yarlford RNB Yarlford RNB Yarlford RNB Taedmorden RNB Taedmorden RNB Taedmorden RNB Yarlford RNB Taedmorden RNB Yarlford RNB Taedmorden RNB Taedmorden RNB Taedmorden RNB Haedleigh RNB Haedleigh |  |
Uasail-Class | RNS Morlich RNS Môr-leidr RNS Iarann RNS Pysgotwr RNS Treilliwr RNS Pysgod | M-140 M-141 M-143 M-144 M-150 M-151 | 1985 1986 1987 1987 1990 1991 | 1,250 | Mine Countermeasure | RNB Haedleigh RNB Haedleigh RNB Haedleigh RNB Haedleigh RNB Yarlford RNB Taedmorden |  |
Gorfodwr-Class | RNS Dagr RNS Smàladair RNS Heliwr RNS Sgeir RNS Pìc RNS Sabre RNS Ymladdwr RNS Horl RNS Llandwyn RNS Stèisean RNS Tòstadh RNS Draoidh RNS Bwrw RNS Brithyll | P-222 P-223 P-224 P-225 P-226 P-227 P-228 P-229 P-230 P-231 P-232 P-233 P-234 P-235 | 1999 1999 1999 1999 1999 1999 1999 1999 1999 2000 2000 2000 2000 2000 | 64 | Fast Patrol | RNB Yarlford RNB Yarlford RNB Yarlford RNB Yarlford RNB Yarlford RNB Yarlford RNB Haedleigh RNB Haedleigh RNB Haedleigh RNB Haedleigh RNB Haedleigh RNB Taedmorden RNB Taedmorden RNB Taedmorden |  |
| | | Auxillary Service | | | | |
| | | Support Fleet | | | | |
Class | Ship | Pennant No. | Commissioned | Displacement | Type | Home Base | Photo |
Gwaredwr-Class | RNS Slànaighear RNS Gofalwr RNS Cùraim RNS Maor RNS Stiùbhard RNS Òrdugh RNS Gorchymyn RNS Trobwll RNS Stòc | A-02 A-03 A-04 A-05 A-06 A-09 A-10 A-11 A-12 A-13 | 1998 1998 1998 1998 1998 1999 1999 1999 2000 2000 | 14,800 | Replenishment Vessel | RNB Treharne RNB Treharne RNB Treharne RNB Treharne RNB Treharne RNB Treharne RNB Treharne RNB Treharne RNB Treharne
|  |
Cyflawniad-Class | RNS Coileanadh RNS Olew RNS Tanwydd RNS Connadh RNS Trwsio RNS Tincear RNS Dewr
| A-20 A-21 A-25 A-26 A-27 A-28 A-29
| 1990 1990 1993 1993 1993 1993 1994 | 12,770 | Fleet Oiler | RNB Treharne RNB Treharne RNB Treharne RNB Treharne RNB Treharne RNB Treharne RNB Treharne
|  |
Trugaredd-Class | RNS Tròcair RNS Cadwwr RNS Gleidhidh RNS Grèim
| H-12 H-13 H-15 H-16
| 1995 1995 1995 1995 | 11,220 | Hospital Ship | RNB Treharne RNB Treharne RNB Treharne RNB Treharne |  |