- 🇳🇴ROEDNES 27 m · Dredger 257240000 8986303 HORTEN INDRE
- 🇳🇱ROG 1 10 m · Port tender 244002804 — CLASS B
- 🇺🇸ROGER F WICKER 109 m 367549260 — STAR FLEET
- 🇳🇱ROGER JEANINE 28 m · Dredger 244710520 — AMSTERDAM
- 🇺🇸ROGER K SHAW 344 m 366963360 — US^0DBJ → 0D0J
- 🇺🇸ROGER L KNIGHT 288 m 368004350 — US^0D02 → 0X16
- 🇪🇸ROJO V 6 m 225986544 — —
- 🇳🇴ROLAND 15 m · Dredger 258023480 — CLASS B
- 🇳🇴ROLF TOMMY 5 m · Law enforcement vessel 257720740 — CLASS B
- 🇺🇸ROLLIN FRITCH 46 m · Law enforcement vessel 338926419 — J
- 🇫🇷ROLLON FECAMP PILOT 12 m · Pilot vessel 227856170 — —
- 🇺🇸ROMAN HAYS 80 m 367439810 8975378 US^06KT → 0SK7
- 🇮🇹ROMEO 15 m · Anti-pollution vessel 247406700 — —
- 🇳🇴ROMSDALSJENTA 23 m · Medical transport 259020720 — AMBULANCE
- 🇩🇪ROMY FRANK 10 m · Search and rescue vessel 211282700 — SAR IN OPERATION
- 🇺🇸RON HULL 209 m 367162840 — CALC, REF
- 🇺🇸RON HUNTER 355 m 367614550 — US^0DJL
- 🇺🇸RON NOKES 228 m 368176610 — US^057T → 0V3F
- 🇦🇺RON TYLER 9 m · Search and rescue vessel 503120420 — —
- 🇺🇸RONALD E. WAGENBLAST 235 m 367371390 — US^0CVM → 0T2C
- 🇺🇸RONALD HULL III 300 m 368055550 — IMTT ST ROSE
- 🇺🇸RONALD L LOUGHMILLER 346 m 367143650 — SOUTH HEIGHTS
- 🇺🇸RONALD L SENSENBACH 284 m 367533170 — USPAH → USNBA → USPAH
- 🇳🇱RONDUIT Search and rescue vessel 244340388 — CLASS B
- 🇳🇿RONGOWAI 28 m 512003862 — CLASS B
- 🇳🇴RONJA QUEEN 77 m · Noncombatant ship 258056000 9910260 CH 16/47662036
- 🇩🇪RONJA RUTEPLATE 42 m · Anti-pollution vessel 211140990 1128158 DEWVN
- 🇸🇪RONNEBY HAMN 10 m · Port tender 265787510 — CLASS B
- 🇺🇸RONNIE ROGERS 211 m 367113160 — US^0SW5 → 0W0W
- 🇺🇸RONZO Diving support vessel 368068980 — KELLOG ISLAND
- 🇮🇪ROSBEG 20 m · Port tender 250001706 — —
- 🇫🇷ROSCOFF-PILOT 14 m · Pilot vessel 227005550 — —
- 🇳🇴ROSEDOKTOREN 21 m · Medical transport 257063530 9869916 SUNDE - LEIRVIK
- 🇳🇴ROSEFLORA 24 m · Medical transport 258026520 9940136 UREN
- 🇩🇪ROSENORT 20 m · Law enforcement vessel 211292150 8779530 DERSK
- 🇬🇮ROSIA BAY 10 m · Pilot vessel 236112896 — CLASS B
- 🇺🇸ROSS ISLAND DREDGE 7 54 m · Dredger 367375750 — CLASS B
- 🇺🇸ROSS ISLAND SANTIAM 12 m · Dredger 338230023 — CLASS B
- 🇺🇸ROSS SALVAGGIO 83 m 366997940 8635875 US^0TZQ → 0WXK
- 🇩🇪ROSTOCK 14 m · Port tender 211757150 — —
- 🇵🇹ROTA 81 m 263440935 — CLASS B
- 🇹🇷ROTA MUSTAFA 64 m · Anti-pollution vessel 271047195 — CLASS B
- 🇦🇺ROTARY 3 8 m · Search and rescue vessel 503041420 — —
- 🇦🇺ROTARY RESCUE 15 m · Search and rescue vessel 503481100 — CLASS B
- 🇦🇺ROTARY SPIRIT 11 m · Search and rescue vessel 503125690 — CLASS B
- 🇳🇱ROTTERDAM 42 m · Law enforcement vessel 244353000 8609888 BUOYAGE OPERATIONS
- 🇳🇱ROTTERDAM 186 m · Dredger 245450000 9229582 INJGD
- 🇺🇾ROU 52 ISLA DE LOBOS 28 m · Search and rescue vessel 770576465 — PUERTO DE MONTEVIDEO
- 🇺🇾ROU 53 ISLA FARALLON 28 m · Search and rescue vessel 770576521 — LA PALOMA UY
- 🇺🇾ROU51 ISLA DE FLORES 23 m · Search and rescue vessel 770576464 — MONTEVIDEO
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