| A/A | Anti Aircraft |
| ABS | Armed Boarding Steamer |
| ABV | Armed Boarding Vessel |
| A/C | Aircraft Carrier/Aircraft |
| AF | Gun Ferry - German |
| AGB | Ice Breaker - USA |
| AH | Hospital/Ambulance Vessel - USA |
| AK | Auxil' Cargo - German |
| AKA | Auxil' Cargo Attack - German |
| AKL | Supply Vessel - USA |
| AMC | Armed Merchant Cruiser |
| AP | Troop Transport - German |
| APA | Troop Transport Attack |
| A/P | Auxil' Patrol |
| APB | Barracks Vessel - USA |
| APD | Fast Transport - USA |
| ARS | Salvage Vessel - USA |
| A/S | Anti-Submarine |
| ATF | Fleet Tug - USA |
| AVD | Seaplane Tender - USA |
| AVP | Seaplane Tender - USA |
| BB | Battleship - US term |
| BBV | Barrage Balloon Vessel |
| BDV | Boom Defence Vessel |
| BKA | Armored Cutter - Russian |
| BO | Sub Chaser - Russian |
| Cstr | Coaster |
| C/O | Captain/Commanding Officer |
| CVE | Carrier Vessel Escort - US term |
| DD | Destroyer |
| DE | Destroyer Escort |
| DM | Minelayer - American |
| DMS | Minesweeper |
| DR | Drifter |
| F | 1 to 100 Fleet Escort - German |
| F | 101 to 1,200 LCT's - German |
| FDS | Fighter Direction Ship |
| GB | Gun Boat |
| Hbr | Harbour/Harbor |
| HDPC | Harbour Defence Patrol Craft |
| HIJMS | His Imperial Japanese Majestys Ship |
| HMAS | His Majestys Australian Ship |
| HMCS | His Majestys Canadian Ship |
| HMS | His Majestys Ship |
| HNMS | His Norwegian Majestys Ship |
| HMNZS | His Majestys New Zealand Ship |
| KFK | Naval Fishing Cutter - German |
| LAG | Light Auxil' Gunboat |
| LB | Landing Barge |
| LCA | Landing Craft Assault |
| LCER | Landing Craft Emergency Repair |
| LCF | Landing Craft A/A or Flak |
| LCG | Landing Craft Gunboat |
| LCH | Landing Craft Headquarters |
| LCI | Landing Craft Infantry |
| LCM | Landing Craft Mechanized |
| LCP | Landing Craft Personnel |
| LCS | Landing Craft Support |
| LCT | Landing Craft Tank |
| LCU | Landing Craft Utility |
| LCV | Landing Craft Vehicle |
| LCVP | Landing Craft Vehicle/Personnel |
| LSD | Landing Ship Dock |
| LSG | Landing Ship Gun |
| LSI | Landing Ship Infantry |
| LSM | Landing Ship Medium |
| LST | Landing Ship Tank |
| LSV | Landing Ship Vehicle |
| M | Minesweeper - German |
| MAC | Motor Attendant Craft |
| MAS | Torpedo Boat - Italian |
| MFP | Naval Ferry Barge - German |
| MFV | Motor Fishing Vessel |
| MGB | Motor Gun Boat - UK |
| M/L | Motor Launch/Mine Layer |
| MO | Sub Chaser - Russian |
| MS | Torpedo Boat - Italian |
| M/S | Minesweeper |
| MTB | Motor Torpedo Boat - UK |
| OBV | Ocean Boarding Vessel |
| PC | Patrol Craft |
| PCE | Patrol Craft Escort |
| P/T | Patrol Torpedo |
| R | Minesweeper - German |
| RA | Minesweeper Captured - German |
| RAAF | Royal Australian Air Force |
| RAF | Royal Air Force |
| RCAF | Royal Canadian Air Force |
| RDB | Ramped Dumb Barge |
| RSAAF | Royal South African Air Force |
| RT | Trawler |
| RVRN | Requisitioned Vessel - Royal Navy |
| S | E Boat |
| SAT | Heavy Auxil' Gunboat |
| SC | Submarine Chaser |
| SF | Landing Craft - German |
| SG | Fast Escort Vessel - German |
| SGB | Steam Gunboat - German |
| SKA | Patrol Boat - Russian |
| SKR | Patrol Ship - Russian |
| SM | Submarine |
| SMS | Seiner Majestat Schiff |
| T | Torpedo Boat - German |
| TA | Captured Torpedo Boat - German |
| TB | Torpedo Boat |
| TKA | Torpedo Boat - Russian |
| TRV | Torpedo Recovery Vessel |
| TS | Training Vessel - US |
| U | U-Boat German |
| UJ | Sub Chaser - German |
| US | United States |
| USCGC | United States Coast Guard Cutter |
| V | Auxil' Patrol Vessel - German |
| YFB | Ferry - USA |
| YMS | Yard Minesweeper |
| YN | Net Layer - USA |
| Z | Destroyer - German |