Glossary
Glossary of terms used in the Royal Navy
Glossary Categories
Organisation Terms
Reference material relating to Royal Navy command structure, ranks, appointments, and administrative terminology associated with leadership, authority, and naval organisation.
Parts of a Ship
Reference material covering the principal structural components of naval vessels, including the main features of hull construction, deck arrangement, and shipboard terminology used in the Royal Navy.
Glossary A–Z
A
- Able Seaman (Naval Ranks)
- Able Seaman (Organisation Terms)
- Acting Sub-Lieutenant (Naval Ranks)
- Active Sonar (Naval Technology)
- Admiral (Naval Ranks)
- Admiral (Naval Ranks)
- Admiral of the Fleet (Naval Ranks)
- Admiral’s Flagship (Age of Sail)
- Admiralty (Organisation Terms)
- Admiralty Board (Naval Law & Administration)
- Admiralty Law (Naval Law & Administration)
- Aegis Combat System (Naval Weapons)
- Age of Sail (Naval History)
- Air Tasking Order (Naval Aviation)
- Airborne Early Warning (AEW) (Naval Aviation)
- Aircraft Carrier (Ship & Fleet Terms)
- Aircraft Carrier (Ship & Fleet Terms)
- Albion-class Landing Platform Dock (Ship Classes)
- Amphibious Assault (WWII) (WWII Naval Warfare)
- Amphibious Assault Ship (Ship & Fleet Terms)
- Amphibious Operation (Naval Warfare)
- Amphibious Ready Group (Modern Naval Doctrine)
- Anchor (Ship Operations)
- Anti-Access/Area Denial (Modern Naval Doctrine)
- Anti-Aircraft Gun (Naval Technology)
- Anti-Ship Missile (Naval Weapons)
- Anti-Submarine Warfare (Naval Technology)
- Anti-Submarine Warfare Helicopter (Naval Aviation)
- Ark Royal-class Carrier (Ship Classes)
- Arleigh Burke-class Destroyer (Ship Classes)
- Armor-Piercing Shell (Gunnery Terms)
- Armour Belt (Naval Technology)
- Arrestor Gear (Naval Aviation)
- Articles of Discipline (Naval Law & Administration)
- Articles of War (Naval Life)
- ASDIC (Sonar) (WWII Naval Warfare)
- Astute-class Submarine (Ship Classes)
- Atago-class Destroyer (Ship Classes)
- Atlantic Gap (WWII Naval Warfare)
- Attack Submarine (Ship & Fleet Terms)
B
- Ballast (Ship Operations)
- Ballast Tank (Ship Construction)
- Ballistic Missile (Naval) (Naval Weapons)
- Ballistic Missile Submarine (Ship & Fleet Terms)
- Barbette (Gunnery Terms)
- Battle Damage (Naval Warfare)
- Battle Fleet (WWII Naval Warfare)
- Battle Group (Ship & Fleet Terms)
- Battle Line Integrity (Age of Sail)
- Battle of the Atlantic (WWII Naval Warfare)
- Battleship (Ship & Fleet Terms)
- Bay-class Landing Ship (Ship Classes)
- Beam (Parts of a Ship)
- Bearing (Navigation Terms)
- Beaufort Scale (Seamanship)
- Bilge (Parts of a Ship)
- Bilge (Ship Construction)
- Bilge Pump (Ship Construction)
- Bismarck-class Battleship (Ship Classes)
- Blast Radius (Gunnery Terms)
- Blockade (Naval Warfare)
- Blockade Running (Naval Warfare)
- Blue Water Navy (Naval Strategy)
- Boarding Action (Naval Warfare)
- Boatswain (Bosun) (Naval Ranks)
- Bosun (Boatswain) (Organisation Terms)
- Bow (Parts of a Ship)
- Bow Rake (Age of Sail)
- Breaking the Line (Age of Sail)
- Bridge (Ship Operations)
- Brimstone Missile (Naval) (Naval Weapons)
- Broadside (Gunnery Terms)
- Broadside (Tactical) (Age of Sail)
- Broadside Weight (Gunnery Terms)
- Brown Water Navy (Naval Strategy)
- Bulkhead (Parts of a Ship)
- Bulkhead Deck (Ship Construction)
C
- Cabin (Naval) (Naval Life)
- Camber (Ship Construction)
- Cap Tally (Naval Life)
- Capital Ship (Ship & Fleet Terms)
- Captain (Naval) (Naval Ranks)
- Captain (RN) (Naval Ranks)
- Carrier Air Wing (Naval Aviation)
- Carrier Operations (Modern Naval Doctrine)
- Carrier Strike Group (Naval Aviation)
- Carrier Strike Group (Naval Warfare)
- Carrier Task Force (WWII Naval Warfare)
- Carrier-Based Aircraft (Naval Aviation)
- Carronade (Gunnery Terms)
- Catapult Launch (Naval Aviation)
- Celestial Navigation (Navigation Terms)
- Centre Division (Age of Sail)
- Chaff (Naval) (Naval Weapons)
- Chain of Authority (Naval Law & Administration)
- Chain of Command (Command Structure)
- Chain of Legal Authority (Naval Law & Administration)
- Chain Shot (Gunnery Terms)
- Chaplain (Naval Ranks)
- Chart (Navigation Terms)
- Chief Petty Officer (Naval Ranks)
- Chokepoint (Maritime) (Naval Strategy)
- Chronometer (Navigation Terms)
- Citadel (Warship) (Naval Technology)
- Cleat (Ship Operations)
- Close Action (Naval Warfare)
- Close Action Order (Age of Sail)
- Close-Hauled Sailing (Age of Sail)
- Close-In Weapon System (Naval Technology)
- Cold War Navy (Naval History)
- Colours (Naval) (Naval Life)
- Colours (Naval) (Naval Life & Traditions)
- Colours Ceremony (Naval Life)
- Combat Air Patrol (CAP) (Naval Aviation)
- Combat Management System (Naval Technology)
- Combined Operations (Modern Naval Doctrine)
- Command of the Sea (Naval Strategy)
- Command Responsibility (Naval Law & Administration)
- Commander (Naval Ranks)
- Commander (Naval Ranks)
- Commanding Officer (Naval Ranks)
- Commanding Officer (Command Structure)
- Commerce Raiding (Naval Warfare)
- Commission (Naval) (Command Structure)
- Commissioning (Ship) (Ship & Fleet Terms)
- Commodore (Naval Ranks)
- Compass (Navigation Terms)
- Convoy (Naval Warfare)
- Convoy Escort (Naval Warfare)
- Convoy Escort (WWII Naval Warfare)
- Convoy System (Naval Warfare)
- Corvette (Ship & Fleet Terms)
- Countermeasure Launcher (Naval Weapons)
- County-class Destroyer (Ship Classes)
- Court Martial (Naval Law & Administration)
- Coxswain (Naval Ranks)
- Crossing the Line (Naval Life)
- Crossing the Line (Naval Life & Traditions)
- Crossing the T (Naval Warfare)
- Cruise Missile (Naval Weapons)
- Cruiser (Ship & Fleet Terms)
- Cyber Warfare (Naval) (Modern Naval Doctrine)
D
- Damage Assessment (Naval Warfare)
- Damage Control (Naval Technology)
- Daring-class Destroyer (1949) (Ship Classes)
- Dead Reckoning (Navigation Terms)
- Deck (Parts of a Ship)
- Deck Armour (Naval Technology)
- Deck Beam (Ship Construction)
- Deck Crew (Naval Aviation)
- Deck Cycle (Naval Aviation)
- Deck Landing (Naval Aviation)
- Deckhand (Naval Life)
- Decommissioning (Ship & Fleet Terms)
- Decoy System (Naval Technology)
- Depth Charge (Naval Technology)
- Depth Charge Pattern (WWII Naval Warfare)
- Destroyer (Ship & Fleet Terms)
- Destroyer (Ship & Fleet Terms)
- Detention (Naval) (Naval Law & Administration)
- Directed Energy Weapon (Naval Weapons)
- Displacement (Ship Construction)
- Displacement (Ship & Fleet Terms)
- Displacement Hull (Naval Engineering)
- Distributed Lethality (Modern Naval Doctrine)
- Divisional Officer (Command Structure)
- Dog Watch (Naval Life)
- Dog Watch (Naval Life & Traditions)
- Double Hull (Ship Construction)
- Draft (Draught) (Parts of a Ship)
- Draft (Ship) (Ship Construction)
- Dreadnought Era (Naval History)
- Drift (Navigation Terms)
- Dry Dock (Naval Engineering)
- Dual-Purpose Gun (Naval Technology)
- Duty Officer (Command Structure)
E
- Electronic Counter-Countermeasures (Naval Weapons)
- Electronic Countermeasures (Naval Technology)
- Electronic Warfare (Naval Technology)
- Electronic Warfare (Modern) (Modern Naval Doctrine)
- Engagement Envelope (Age of Sail)
- Engineer Officer (Naval Ranks)
- Escort Carrier (WWII Naval Warfare)
- Escort Vessel (Naval Warfare)
- Essex-class Carrier (Ship Classes)
- Executive Officer (Naval Ranks)
- Executive Officer (Command Structure)
- Exocet Missile (Naval Weapons)
- Expeditionary Warfare (Modern Naval Doctrine)
F
- Fathom (Navigation Terms)
- Fighting Instructions (Age of Sail)
- Fire Control System (Naval Technology)
- Fire Discipline (Age of Sail)
- Fire Ship (Naval Warfare)
- First Lieutenant (Naval Ranks)
- First Watch (Naval Life & Traditions)
- Flag Captain (Command Structure)
- Flag Officer (Organisation Terms)
- Flag Signals (Age of Sail)
- Flagship (Ship & Fleet Terms)
- Flare (Naval) (Naval Weapons)
- Fleet (Ship & Fleet Terms)
- Fleet Action (Naval Warfare)
- Fleet Air Defence (Naval Warfare)
- Fleet Auxiliary (Ship & Fleet Terms)
- Fleet Carrier (WWII Naval Warfare)
- Fleet Cohesion (Age of Sail)
- Fleet Commander (Command Structure)
- Fleet Composition (Ship & Fleet Terms)
- Fleet Discipline (Age of Sail)
- Fleet Doctrine (Naval Strategy)
- Fleet Engagement (Naval Warfare)
- Fleet Engagement Range (Age of Sail)
- Fleet in Being (Naval Warfare)
- Fleet Manoeuvre (Age of Sail)
- Fleet Review (Naval Life & Traditions)
- Fleet Screening (WWII Naval Warfare)
- Fleet Signal (Age of Sail)
- Fleet Train (Naval Logistics)
- Fletcher-class Destroyer (Ship Classes)
- Flight Deck (Naval Technology)
- Flight Deck Operations (Naval Aviation)
- Flight Deck Safety (Naval Aviation)
- Flogging (Naval Life)
- Flotilla (Ship & Fleet Terms)
- Flower-class Corvette (Ship Classes)
- Force Projection (Modern Naval Doctrine)
- Ford-class Carrier (Ship Classes)
- Fore-and-Aft Rig (Seamanship)
- Forecastle (Parts of a Ship)
- Fort-class Support Ship (Ship Classes)
- Fragmentation (Gunnery Terms)
- Frame (Ship) (Ship Construction)
- Freeboard (Ship Construction)
- Freeboard (Ship Operations)
- Freedom of Navigation (Modern Naval Doctrine)
- Frigate (Ship & Fleet Terms)
- Frigate (Ship & Fleet Terms)
G
- Galley (Naval Life)
- Gearing-class Destroyer (Ship Classes)
- General Chase (Age of Sail)
- Goalkeeper CIWS (Naval Weapons)
- Grapeshot (Gunnery Terms)
- Great Circle (Navigation Terms)
- Green Water Navy (Naval Strategy)
- Grog (Naval Life)
- Gun Battery (Gunnery Terms)
- Gun Deck (Parts of a Ship)
- Gun Salute (Naval Life & Traditions)
- Gunner (Naval) (Naval Ranks)
- Gunnery Drill (Age of Sail)
- Gunnery Officer (Naval Ranks)
- Gunroom (Naval Life)
- Gunwale (Parts of a Ship)
H
- Hammock (Naval Life)
- Hands to Dinner (Naval Life)
- Hangar Deck (Naval Aviation)
- Harpoon Missile (Naval Weapons)
- Heave To (Seamanship)
- Hedgehog (Weapon) (Naval Technology)
- Heel (Seamanship)
- Helm (Ship Operations)
- High-Explosive Shell (Gunnery Terms)
- Huff-Duff (WWII Naval Warfare)
- Hull (Parts of a Ship)
- Hull Classification Symbol (Ship & Fleet Terms)
- Hull Form (Naval Engineering)
- Hull Plating (Ship Construction)
- Hull-Mounted Sonar (Naval Technology)
- Hunt-class Mine Countermeasure Vessel (Ship Classes)
- Hunter-Killer Group (WWII Naval Warfare)
- Hydrodynamics (Naval Engineering)
I
- Illustrious-class Carrier (Ship Classes)
- Impressment (Naval Life)
- Information Dominance (Modern Naval Doctrine)
- Integrated Mast (Naval Technology)
- Invincible-class Carrier (Ship Classes)
- Iowa-class Battleship (Ship Classes)
- Ironclad Era (Naval History)
J
- Joint Operations (Modern Naval Doctrine)
- Judge Advocate (Naval Law & Administration)
K
- Kamikaze Attack (WWII Naval Warfare)
- Keel (Parts of a Ship)
- Keel Depth (Seamanship)
- Keel Plate (Ship Construction)
- Keelhauling (Naval Life)
- Keelson (Parts of a Ship)
- Keelson (Ship Construction)
- King’s Regulations (Naval Law & Administration)
- Kirov-class Battlecruiser (Ship Classes)
- Kongo-class Destroyer (Ship Classes)
L
- Landing Ship (Ship & Fleet Terms)
- Landing Signal Officer (LSO) (Naval Aviation)
- Last Watch (Naval Life & Traditions)
- Latitude (Navigation Terms)
- Law of the Sea (Naval Law & Administration)
- Lead Ship (Ship & Fleet Terms)
- Leading Seaman (Naval Ranks)
- Leander-class Frigate (Ship Classes)
- Leeward (Seamanship)
- Leeward Position (Naval Warfare)
- Leeway (Navigation Terms)
- Legal Officer (Naval Law & Administration)
- Letter of Marque (Naval Warfare)
- Liberty (Naval) (Naval Life)
- Liberty Convoy (WWII Naval Warfare)
- Liberty Ship (Ship Classes)
- Lieutenant (Naval Ranks)
- Lieutenant (Naval Ranks)
- Lieutenant Commander (Naval Ranks)
- Line Ahead (Naval Warfare)
- Line of Battle (Naval Warfare)
- Line of Battle (Age of Sail)
- Line of Battle Ship (Naval Warfare)
- Littoral Warfare (Modern Naval Doctrine)
- Log (Ship Log) (Navigation Terms)
- Long Gun (Gunnery Terms)
- Longitude (Navigation Terms)
- Longitudinal Framing (Ship Construction)
- Los Angeles-class Submarine (Ship Classes)
M
- Magazine Explosion (Naval Warfare)
- Magnetic Mine (WWII Naval Warfare)
- Maritime Domain Awareness (Modern Naval Doctrine)
- Maritime Interdiction (Modern Naval Doctrine)
- Maritime Law (Naval Law & Administration)
- Maritime Patrol (Modern Naval Doctrine)
- Maritime Security (Modern Naval Doctrine)
- Maritime Strategy (Naval Strategy)
- Maritime Strike (Modern Naval Doctrine)
- Mast (Parts of a Ship)
- Master-at-Arms (Naval Ranks)
- Medical Officer (Naval Ranks)
- Mess (Naval Life)
- Mess Deck (Naval Life)
- Mess Deck (Naval Life & Traditions)
- Messmates (Naval Life)
- Metacentric Height (Naval Engineering)
- Middle Watch (Naval Life & Traditions)
- Midshipman (Parts of a Ship)
- Midshipman (Organisation Terms)
- Midshipman (Naval Ranks)
- Mine Countermeasures (Naval Technology)
- Mine Sweeper (WWII Naval Warfare)
- Mine Warfare (Naval Technology)
- Minehunter (Ship & Fleet Terms)
- Missile System (Naval Technology)
- Modern Naval Warfare (Naval Strategy)
- Multi-Domain Operations (Modern Naval Doctrine)
- Mutiny (Naval Life)
N
- Naval Administration (Naval Law & Administration)
- Naval Architecture (Naval Engineering)
- Naval Arms Race (Naval History)
- Naval Artillery (Naval Warfare)
- Naval Aviation (Naval Technology)
- Naval Aviation Fuel (Naval Aviation)
- Naval Aviation Maintenance (Naval Aviation)
- Naval Base (Naval Infrastructure)
- Naval Blockade (Naval Warfare)
- Naval Blockade (WWII) (WWII Naval Warfare)
- Naval Bombardment (WWII Naval Warfare)
- Naval Campaign (Naval Warfare)
- Naval Ceremony (Naval Life & Traditions)
- Naval Command (Command Structure)
- Naval Command Structure (Naval Law & Administration)
- Naval Communications (Naval Technology)
- Naval Deterrence (Modern Naval Doctrine)
- Naval Discipline (Naval Life)
- Naval Discipline Code (Naval Law & Administration)
- Naval Doctrine (Naval Strategy)
- Naval Ensign (Naval Life)
- Naval Etiquette (Naval Life)
- Naval Expedition (Naval History)
- Naval Fighter (Naval Aviation)
- Naval Formation (Ship & Fleet Terms)
- Naval Gun System (Naval Technology)
- Naval Gunnery (Naval Warfare)
- Naval Helicopter (Naval Aviation)
- Naval Intelligence (Naval Strategy)
- Naval Jurisdiction (Naval Law & Administration)
- Naval Justice (Naval Law & Administration)
- Naval Law (Naval Law & Administration)
- Naval Logistics (Naval Strategy)
- Naval Mine (Naval Technology)
- Naval Minefield (Naval Warfare)
- Naval Orders (Naval Law & Administration)
- Naval Presence (Modern Naval Doctrine)
- Naval Prison (Naval Law & Administration)
- Naval Regulations (Naval Law & Administration)
- Naval Squadron (Ship & Fleet Terms)
- Naval Staff (Command Structure)
- Naval Strategy (Naval Strategy)
- Naval Strike Missile (Naval Weapons)
- Naval Supremacy (Naval Strategy)
- Naval Tactics (Naval Strategy)
- Naval Tasking (Modern Naval Doctrine)
- Naval Tradition (Naval Life & Traditions)
- Naval Treaty (Naval Law & Administration)
- Naval Tribunal (Naval Law & Administration)
- Naval Uniform (Naval Life)
- Navigation Officer (Naval Ranks)
- Navigator (Naval) (Naval Ranks)
- Nelsonian Tactics (Age of Sail)
- Neptune Ceremony (Naval Life)
- Network-Centric Warfare (Modern Naval Doctrine)
- Nimitz-class Carrier (Ship Classes)
O
- Officer Cadet (Naval Ranks)
- Officer Commission (Naval Law & Administration)
- Officer of the Watch (Command Structure)
- Oiler (Naval) (Ship & Fleet Terms)
- Oliver Hazard Perry-class Frigate (Ship Classes)
- Operation Overlord (Naval) (WWII Naval Warfare)
- Operation Torch (WWII Naval Warfare)
- Orders (Naval) (Command Structure)
- Ordinary Seaman (Naval Ranks)
P
- Pacific Island Hopping (WWII Naval Warfare)
- Passive Sonar (Naval Technology)
- Patrol Vessel (Ship & Fleet Terms)
- Pennant Number (Ship & Fleet Terms)
- Petty Officer (Naval Ranks)
- Phalanx CIWS (Naval Technology)
- Phalanx CIWS (Naval Weapons)
- Pilotage (Navigation Terms)
- Pipe (Bosun’s Call) (Naval Life)
- Pipe Down (Naval Life)
- Pipe the Side (Naval Life & Traditions)
- Pitch (Seamanship)
- Planing Hull (Naval Engineering)
- Port (Ship Operations)
- Powder Magazine (Gunnery Terms)
- Power Projection (Naval Strategy)
- Power Projection at Sea (Modern Naval Doctrine)
- Press Gang (Naval Life)
- Privateer (Naval Warfare)
- Prize Ship (Naval Warfare)
- Punishment (Naval) (Naval Law & Administration)
Q
- Quarterdeck (Parts of a Ship)
- Quartermaster (Naval Ranks)
- Quartermaster (Rank) (Naval Ranks)
- Queen Elizabeth-class Carrier (Ship Classes)
R
- Radar (Naval Technology)
- Radar Picket Ship (WWII Naval Warfare)
- Railgun (Naval) (Naval Weapons)
- Raking Fire (Naval Warfare)
- Raking Position (Age of Sail)
- RAM Missile (Naval Weapons)
- Rangefinder (Naval Technology)
- Rate (Ship Rating) (Ship & Fleet Terms)
- Rations (Naval) (Naval Life)
- Rear Admiral (Naval Ranks)
- Rear Division (Age of Sail)
- Replenishment at Sea (Ship & Fleet Terms)
- Replenishment at Sea (Naval Logistics)
- Rhumb Line (Navigation Terms)
- Rig (Ship) (Seamanship)
- Rigging (Parts of a Ship)
- River-class Patrol Vessel (Ship Classes)
- Roll (Seamanship)
- Round Shot (Gunnery Terms)
- Rudder (Parts of a Ship)
- Rules of Conduct (Naval Law & Administration)
- Rules of Engagement (Naval Warfare)
- Rules of Engagement (Legal) (Naval Law & Administration)
- Rules-Based Order (Maritime) (Modern Naval Doctrine)
S
- Saluting (Naval) (Naval Life)
- Sandown-class Minehunter (Ship Classes)
- Satellite Navigation (Naval Technology)
- Screening Force (Naval Warfare)
- Scupper (Parts of a Ship)
- Sea Ceptor Missile (Naval Weapons)
- Sea Control (Modern Naval Doctrine)
- Sea Dart Missile (Naval Weapons)
- Sea Denial (Naval Strategy)
- Sea Lines of Communication (Naval Strategy)
- Sea Power (Naval Strategy)
- Sea Room (Seamanship)
- Sea Shanty (Naval Life)
- Sea State (Seamanship)
- Sea Wolf Missile (Naval Weapons)
- Seaman Recruit (Naval Ranks)
- Semaphore (Navigation Terms)
- Sextant (Navigation Terms)
- Sheer Line (Ship Construction)
- Shell (Naval) (Gunnery Terms)
- Ship Class (Ship & Fleet Terms)
- Ship Classes (Ship & Fleet Terms)
- Ship Stability (Naval Engineering)
- Ship Types (Ship & Fleet Terms)
- Ship’s Routine (Naval Life)
- Shipyard (Naval Engineering)
- Shock Damage (Naval Warfare)
- Shore Leave (Naval Life)
- Short Take-Off and Vertical Landing (STOVL) (Naval Aviation)
- Shot (Naval) (Gunnery Terms)
- Shrapnel (Gunnery Terms)
- Signal Book (Age of Sail)
- Signal Flag (Navigation Terms)
- Signal Flag Code (Age of Sail)
- Signal Officer (Command Structure)
- Signalman (Naval Ranks)
- Ski Jump Ramp (Naval Aviation)
- Slava-class Cruiser (Ship Classes)
- Smart Munition (Naval Weapons)
- Sonar (Naval Technology)
- Sortie Rate (Naval Aviation)
- Sounding (Navigation Terms)
- Soundings Chart (Navigation Terms)
- Splice the Mainbrace (Naval Life)
- Spruance-class Destroyer (Ship Classes)
- Squadron (Ship & Fleet Terms)
- Square Rig (Seamanship)
- Standard Missile (Naval Weapons)
- Standing Orders (Command Structure)
- Standing Orders (Legal) (Naval Law & Administration)
- Starboard (Ship Operations)
- Station Keeping (Age of Sail)
- Stealth Technology (Naval Technology)
- Stern (Parts of a Ship)
- Stern Rake (Age of Sail)
- Stoker (Naval Ranks)
- Strategic Deterrence (Modern Naval Doctrine)
- Strategic Reserve (Naval Strategy)
- Strike Fighter (Naval Aviation)
- Strike Group (Naval Warfare)
- Stringer (Ship Construction)
- Sub-Lieutenant (Naval Ranks)
- Submarine (Ship & Fleet Terms)
- Submarine (Ship & Fleet Terms)
- Summary Trial (Naval Law & Administration)
- Sunset (Naval) (Naval Life)
- Superstructure (Ship Construction)
- Supply Officer (Naval Ranks)
- Surface-to-Air Missile (Naval Technology)
- Surface-to-Surface Missile (Naval Technology)
- Swiftsure-class Submarine (Ship Classes)
T
- Tacking (Seamanship)
- Task Force (Ship & Fleet Terms)
- Task Group (Ship & Fleet Terms)
- Ticonderoga-class Cruiser (Ship Classes)
- Tomahawk Cruise Missile (Naval Weapons)
- Tonnage (Ship & Fleet Terms)
- Torpedo (Naval Technology)
- Torpedo Tube (Naval Weapons)
- Tot (Rum Ration) (Naval Life)
- Towed Array Sonar (Naval Technology)
- Trafalgar-class Submarine (Ship Classes)
- Transverse Framing (Ship Construction)
- Tribal-class Destroyer (Ship Classes)
- Trim (Ship) (Seamanship)
- Trim (Ship) (Naval Engineering)
- Turret (Naval) (Naval Technology)
- Type 21 Frigate (Ship Classes)
- Type 22 Frigate (Ship Classes)
- Type 23 Frigate (Ship Classes)
- Type 26 Frigate (Ship Classes)
- Type 31 Frigate (Ship Classes)
- Type 42 Destroyer (Ship Classes)
- Type 45 Destroyer (Ship Classes)
- Type VII Submarine (Ship Classes)
- Type XXI Submarine (Ship Classes)
U
- U-boat (WWII Naval Warfare)
- Udaloy-class Destroyer (Ship Classes)
- Underway (Seamanship)
- Underway Replenishment (Naval Logistics)
- Unmanned Surface Vessel (Naval Technology)
- Unmanned Underwater Vehicle (Naval Technology)
V
- Van Division (Age of Sail)
- Vanguard-class Submarine (Ship Classes)
- Vertical Launch System (Naval Technology)
- Vertical Launch System (VLS) (Naval Weapons)
- Vertical Take-Off and Landing (VTOL) (Naval Aviation)
- Vice Admiral (Naval Ranks)
- Victory Ship (Ship Classes)
- Virginia-class Submarine (Ship Classes)
W
- Wardroom (Naval Life & Traditions)
- Wardroom (Naval Life)
- Warrant Officer (Organisation Terms)
- Warrant Officer (Naval Ranks)
- Warship (Ship & Fleet Terms)
- Watch (Ship Operations)
- Watch System (Naval Life & Traditions)
- Watchkeeping (Naval Life)
- Watertight Compartment (Ship Construction)
- Wave-class Tanker (Ship Classes)
- Wave-Off (Naval Aviation)
- Waypoint (Navigation Terms)
- Wearing Ship (Seamanship)
- Weather Gage (Age of Sail)
- Weather Gauge (Naval Warfare)
- Windward (Seamanship)
- Wire-Guided Torpedo (Naval Weapons)
- Wolfpack Tactics (WWII Naval Warfare)
X
No entries for X.
Y
- Yamato-class Battleship (Ship Classes)
- Yaw (Seamanship)
- Yeoman of Signals (Naval Ranks)
Z
- Zumwalt-class Destroyer (Ship Classes)
#
No entries for #.