Macchi M5 (1917) Regia Aeronautica (1917-26), 148 built The Italian seaplane fighter of WWI The first Italian seaplane was built by Nieuport-Macchi in Varese, copying a captured Austrian Lohner L observation seaplane. From the L.1 and L.2 came the M.3 single-seat observation biplane in 1916. It appeared soon performances were impressive enough to convert it … Read more
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| AA | Anti-Aircraft |
| AAW | // warfare |
| AAS | Amphibious Assault Ship |
| Adm | Admiral |
| AEW | Airbone early warning |
| AG | Air Group |
| AFV | Armored Fighting Vehicle |
| AMGB | armoured motor gunboat |
| AP | Armor Piercing |
| APC | Armored Personal Carrier |
| AS | Antisubmarine |
| ASM | Air-to-surface Missile |
| ASMD | Anti Ship Missile Defence |
| ASROC | ASW Rockets |
| ASW | Anti Submarine Warfare |
| ASWRL | ASW Rocket Launcher |
| ATW | ahead thrown weapon |
| avgas | Aviation Gasoline |
| aw | Above Waterline |
| AWACS | Airborne warning & control system |
| BB | Battleship |
| bhp | brake horsepower |
| BL | Breach-loader (gun) |
| BLR | Breach-loading, Rifled (gun) |
| BU | Broken Up |
| c | circa |
| CA | Armoured/Heavy cruiser |
| Capt. | Captain |
| Cal | Caliber or ".php" |
| CG | Missile Cruiser |
| CIC | Combat Information Center |
| C-in-C | Commander in Chief |
| CIWS | Close-in weapon system |
| CE | Compound Expansion (engine) |
| Ch | Chantiers ("Yard", FR) |
| CL | Cruiser, Light |
| cm | centimeter(s) |
| CMB | Coastal Motor Boat |
| CMS | Coastal Minesweeper |
| CNO | Chief of Naval Operations |
| Cp | Compound (armor) |
| Co | Company |
| COB | Compound Overhad Beam |
| CODAG | Combined Diesel & Gas |
| CODOG | Combined Diesel/Gas |
| COGAG | Combined Gas and Gas |
| COGOG | Combined Gas/Gas |
| comm | commissioned |
| comp | completed |
| conv | converted |
| convl | conventional |
| COSAG | Combined Steam & Gas |
| CR | Compound Reciprocating |
| CRCR | Same, connecting rod |
| CruDiv | Cruiser Division |
| CP | Controlled Pitch |
| CT | Conning Tower |
| CTL | constructive total loss |
| CTOL | Conv. Take off & landing |
| CTp | Compound Trunk |
| cu | cubic |
| Cyl | Cylinder(s) |
| CV | Aircraft Carrier |
| CVA | // Attack |
| CVE | // Escort |
| CVL | // Light |
| CVS | // ASW support |
| cwt | Hundredweight |
| DA | Direct Action |
| DASH | Drone ASW Helicopter |
| DC | Depht Charge |
| DCT | // Track |
| DCR | // Rack |
| DCT | // Thrower |
| DD | Destroyer/drydock |
| DE | Double Expansion |
| DE | Destroyer Escort |
| DDE | // Converted |
| DesRon | Destroyer Squadron |
| DF | Double Flux |
| D/F | Direction(finding) |
| DP | Dual Purpose |
| DUKW | Amphibious truck |
| DyD | Dockyard |
| EOC | Elswick Ordnance Co. |
| ECM | Electronic Warfare |
| ESM | Electronic support measure |
| F | Farenheit |
| FCS | Fire Control System |
| FF | Frigate |
| fps | Feet Per Second |
| ft | Feets |
| FY | Fiscal Year |
| gal | gallons |
| GM | Metacentric Height |
| GPMG | General Purpose Machine-gun |
| GRP | Fiberglass |
| GRT | Gross Tonnage |
| GUPPY | Greater Underwater Prop.Pow. |
| HA | High Angle |
| HC | Horizontal Compound |
| HCR | // Reciprocating |
| HCDA | // Direct Acting |
| HCDCR | // connecting rod |
| HDA | // direct acting |
| HDAC | // acting compound |
| HDAG | // acting geared |
| HDAR | // acting reciprocating |
| HDML | Harbor def. Motor Launch |
| H/F | High Frequency |
| HF/DF | // Directional Finding |
| HMS | Her Majesty Ship |
| HN | Harvey Nickel |
| HNC | Horizontal non-condensing hp |
| HP | High Pressure |
| hp | horizontal |
| HQ | Headquarter |
| HR | Horizontal reciprocating |
| HRCR | // connecting rod |
| HS | Harbor Service |
| HS(E) | Horizontal single (expansion) |
| HSET | // trunk |
| HT | Horizontal trunk |
| HTE | // expansion |
| IC | Inverted Compound |
| IDA | Inverted direct acting |
| IFF | Identification Friend or Foe |
| ihp | indicated horsepower |
| IMF | Inshore Minesweeper |
| in | Inche(s) |
| irc | ironclad |
| KC | Krupp, cemented |
| kg | Kilogram |
| KNC | // non cemented |
| km | Kilometer |
| kt(s) | Knot(s) |
| kw | kilowatt |
| ib | pound(s) |
| LA | Low Angle |
| LC | Landing Craft |
| LCA | // Assault |
| LCAC | // Air Cushion |
| LFC | // Flak (AA) |
| LCG | // Gunboat |
| LCG(L) | /// Large |
| LCG(M) | /// Medium |
| LCG(S) | /// Small |
| LCI | // Infantry |
| LCM | // Mechanized |
| LCP | // Personel |
| LCP(R) | /// Rocket |
| LCS | // Support |
| LCT | // Tanks |
| LCV | // Vehicles |
| LCVP | /// Personal |
| LCU | // Utility |
| loco | locomotive (boiler) |
| LSC | Landing ship, support |
| LSD | // Dock |
| LSF | // Fighter (direction) |
| LSM | // Medium |
| LSS | // Stern chute |
| LST | // Tank |
| LSV | // Vehicle |
| LP | low pressure |
| lwl | lenght waterline |
| m | metre(s) |
| M | Model |
| MA/SB | motor AS boat |
| max | maximum |
| MG | Machine Gun |
| MGB | Motor Gunboat |
| MLS | Minelayer/Sweeper |
| ML | Motor Launch |
| MMS | Motor Minesweper |
| MT | Military Transport |
| MTB | Motor Torpedo Boat |
| HMG | Heavy Machine Gun |
| MCM(V) | Mine countermeasure Vessel |
| min | minute(s) |
| Mk | Mark |
| ML | Muzzle loading |
| MLR | // rifled |
| MSO | Ocean Minesweeper |
| mm | millimetre |
| NC | non condensing |
| nhp | nominal horsepower |
| nm | Nautical miles |
| N° | Number |
| NBC/ABC | Nuc. Bact. Nuclear |
| NS | Nickel steel |
| NTDS | Nav.Tactical Def.System |
| NyD | Naval Yard |
| oa | Overall |
| OPV | Offshore Patrol Vessel |
| PC | Patrol Craft |
| PDMS | Point Defence Missile System |
| pdr | pounder |
| pp | perpendicular |
| psi | pounds per square inch |
| PVDS | Propelled variable-depth sonar |
| QF | Quick Fire |
| QFC | // converted |
| RAdm | Rear Admiral |
| RC | Radio-control/led |
| RCR | return connecting rod |
| rec | Rectangular |
| rev | Revolver |
| RF | Rapid Fire |
| RPC | Remote Control |
| rpg | Round per gun |
| SAM | Surface to air Missile |
| SAR | Search Air Rescue |
| sb | Smoothbore |
| SB | Ship Builder |
| SC | Sub-chaser (hunter) |
| SSBN | Ballistic Missile sub.Nuclear |
| SE | Simple Expansion |
| SET | // trunk |
| SG | Steeple-geared |
| shp | Shaft horsepower |
| SH | simple horizontal |
| SOSUS | Sound Surv. System |
| SPR | simple pressure horiz. |
| sq | square |
| SS | Submarine (Conv.) |
| SSM | Surface-surface Missile |
| sub | submerged |
| sf | steam frigate |
| SLBM | Sub.Launched Ballistic Missile |
| spf | steam paddle frigate |
| STOVL | Short Take off/landing |
| SUBROC | Sub.Fired ASW Rocket |
| t | ton, long (short in bracket) |
| TACAN | Tactical Air Nav. |
| TB | Torpedo Boat |
| TBD | // destroyer |
| TC | Torpedo carriage |
| TE | Triple expansion |
| TER | // reciprocating |
| TF | Task Force |
| TGB | Torpedo gunboat |
| TG | Task Group |
| TL | Torpedo launcher |
| TLC | // carriage |
| TNT | Trinitroluene |
| TS | Training Ship |
| TT | Torpedo Tube |
| UDT | Underwater Demolition Team |
| UHF | Ultra High Frequency |
| Vadm | Vice Admiral |
| VC | Vertical compound |
| VCE | // expansion |
| VDE | / double expansion |
| VDS | Variable Depth Sonar |
| VIC | / inverted compound |
| VLF | Very Low Frequency |
| VQL | / quadruple expansion |
| VSTOL | Vertical/short take off/landing |
| VTE | / triple expansion |
| VTOL | Vertical take off/landing |
| VSE | / Simple Expansion |
| wks | Works |
| wl | waterline |
| WT | Wireless Telegraphy |
| x | number of |
| Yd | Yard |
| GIUK | Greenland-Iceland-UK |
| BuShips | Bureau of Ships |
| DBM | German Navy League |
| GB | Great Britain |
| DNC | Directorate of Naval Construction |
| EEZ | Exclusive Economic Zone |
| FAA | Fleet Air Arm |
| FNFL | Free French Navy |
| JMSDF | Jap.Mar.Self-Def.Force |
| MDAP | Mutual Def.Assistance Prog. |
| MSA | Maritime Safety Agency |
| NATO | North Atlantic Treaty Org. |
| RAF | Royal Air Force |
| RAN | Royal Australian Navy |
| RCN | Royal Canadian Navy |
| R&D | Research & Development |
| RN | Royal Navy |
| RNZN | Royal New Zealand Navy |
| ussr | Union of Socialist Republics |
| UE/EEC | European Union/Comunity |
| UN | United Nations Org. |
| USN | United States Navy |
| WaPac | Warsaw Pact |
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