| O. A. Knudsen mt | 12672 | 1 | ||
| O. A. Knudsen m | 10501 | 3 | ||
| OB-1 l | 18459 | 5 | ||
| O. B. Sørensen mt | 13641 | 7 | ||
| O. B. Sørensen m | 9774 | 9 | ||
| O. C. m | 10555 | 11 | ||
| O. E. Iversen ms | 16374 | 13 | ||
| O. Larsen ms | 16270 | 15 | ||
| O. T. Tønnevold mt | 14666 | 17 | ||
| Oak ms | 17560 | 19 | ||
| Oak mt | 15012 | 21 | ||
| Oakland d | 11770 | 23 | ||
| Oakley dt | 12830 | 25 | ||
| Oaktank mt | 10731 | 27 | ||
| Oakville ms | 13896 | 29 | ||
| Obo Baron ms/mt | 16631 | 31 | ||
| Obo Buzzard ms | 20577 | 33 | ||
| Obo Duke ms/mt | 17391 | 35 | ||
| Obo Empress ms/mt | 16844 | 37 | ||
| Obo King ms/mt | 18839 | 39 | ||
| Obo Prince ms/mt | 16290 | 41 | ||
| Obo Princess ms/mt | 18886 | 43 | ||
| Obo Queen ms/mt | 16925 | 45 | ||
| Obrestad ms | 15203 | 47 | ||
| Obrestad ms | 17251 | 49 | ||
| Obrestad ms | 14678 | 51 | ||
| Ocean m | 4000 | 53 | ||
| Ocean I m | 8066 | 55 | ||
| Ocean II m | 57 | |||
| Ocean Commander ms | 19886 | 59 | ||
| Ocean Fighter ms | 17741 | 61 | ||
| Ocean Fortune ds | 13866 | 63 | ||
| Ocean Liberty d | 11544 | 65 | ||
| Ocean Master ms | 15460 | 67 | ||
| Ocean Princess | 19592 | 69 | ||
| Ocean Queen m | 12434 | 71 | ||
| Ocean Research ms | 13112 | 73 | ||
| Ocean Senior m | 10061 | 75 | ||
| Ocean Surveyor ms | 19310 | 77 | ||
| Ocean Swell d | 12716 | 79 | ||
| Ocean Trader dt | 17485 | 81 | ||
| Ocean Trader mt | 15055 | 83 | ||
| Octavia m | 85 | |||
| Octavian dt | 16943 | 87 | ||
| Octavian d | 10486 | 89 | ||
| Oda m | 11712 | 91 | ||
| Odd m | 10030 | 93 | ||
| Odd I m | 10156 | 95 | ||
| Odd II m | 97 | |||
| Odd XI ds | 12328 | 99 | ||
| Odd XII ds | 12329 | 101 | ||
| Odd-Einar m | 11176 | 103 | ||
| Odd Lundberg ms | 13702 | 105 | ||
| Odd Radi m | 10504 | 107 | ||
| Odda d | 8566 | 109 | ||
| Oddbjørg ms | 111 | |||
| Oddbjørn m | 113 | |||
| Oddenes M/gs | 7786 | 115 | ||
| Oddernes d | 11115 | 117 | ||
| Oddmund m | 6193 | 119 | ||
| Oddskjær m | 9155 | 121 | ||
| Oddstein ms | 18324 | 123 | ||
| Oddstein ms | 17395 | 125 | ||
| Oddstein m | 12788 | 127 | ||
| Oddtun ms | 15598 | 129 | ||
| Oddvar II d | 9405 | 131 | ||
| Odel ms | 15604 | 133 | ||
| Oder m | 5773 | 135 | ||
| Odin ms | 20183 | 137 | ||
| Odin d | 3542 | 139 | ||
| Odin m | 141 | |||
| Odin Salvator ms | 17681 | 143 | ||
| Odnes m | 11996 | 145 | ||
| Oddny m | 5448 | 147 | ||
| Offshore Prince ms | 18939 | 149 | ||
| Ofotfjord m | 11688 | 151 | ||
| Ogna ms | 17407 | 153 | ||
| Ogna m | 10689 | 155 | ||
| Oiltank tankl | 19578 | 157 | ||
| Oimara m | 8035 | 159 | ||
| Okla ms | 15371 | 161 | ||
| Oksvald m | 9145 | 163 | ||
| Ola d | 3388 | 165 | ||
| Ola Ryggefjord m | 12699 | 167 | ||
| Olaf Bergh d | 8034 | 169 | ||
| Olaf Fostenes m | 10237 | 171 | ||
| Olaf Gustav m | 1939 | 173 | ||
| Olafur Tryggvason ms | 175 | |||
| Olanda mt | 16777 | 177 | ||
| Olaug ms | 14335 | 179 | ||
| Olaug ms | 7276 | 181 | ||
| Olav V ms | 19038 | 183 | ||
| Olav Bakke m | 11055 | 185 | ||
| Olav Ringdal jr. mt | 11990 | 187 | ||
| Olav Trygvason mt | 17658 | 189 | ||
| Olav Viking ms | 17876 | 191 | ||
| Olava m | 9240 | 193 | ||
| Olavsbussen ms | 17408 | 195 | ||
| Olavson m | 10452 | 197 | ||
| Olden Senior ms | 13551 | 199 | ||
| Oldedølen m | 7331 | 201 | ||
| Older ms | 14423 | 203 | ||
| Oldernæs d | 347 | 205 | ||
| Oldersund m | 207 | |||
| Ole Bratt m | 11050 | 209 | ||
| Ole Bratt m | 10009 | 211 | ||
| Ole Bratt d | 10734 | 213 | ||
| Ole Bull d | 11251 | 215 | ||
| Ole-Einar ms | 217 | |||
| Ole Henrik ms | 14857 | 219 | ||
| Ole Henrik m | 221 | |||
| Ole Jacob m | 10606 | 223 | ||
| Ole Rinde ms | 15860 | 225 | ||
| Ole Wegger d | 9277 | 227 | ||
| Olebjørn m | 11608 | 229 | ||
| Oljaren m | 10018 | 231 | ||
| Oljeren d | 6055 | 233 | ||
| Olsen ms | 13588 | 235 | ||
| Olsok m | 8858 | 237 | ||
| Olskjer m | 239 | |||
| Olter d | 9739 | 241 | ||
| Oma d | 4732 | 243 | ||
| Ombo ms | 14628 | 245 | ||
| Ombofjord m | 2694 | 247 | ||
| Omega m | 249 | |||
| Omega 801 ms | 19001 | 251 | ||
| Omega 803 ms | 17905 | 253 | ||
| Omega 804 ms | 17853 | 255 | ||
| Omega 805 ms | 17951 | 257 | ||
| Onarheim m | 259 | |||
| Onarøy m | 10365 | 261 | ||
| Ondur ms | 17653 | 263 | ||
| Ondur m | 6478 | 265 | ||
| Onega ms | 11186 | 267 | ||
| Onstad Trader ms | 18949 | 269 | ||
| Onward I m | 6767 | 271 | ||
| Onyx m | 554 | 273 | ||
| Opal ms | 13158 | 275 | ||
| Opal m | 277 | |||
| Ophir d | 11884 | 279 | ||
| Ophir d | 3971 | 281 | ||
| Opo m | 11531 | 283 | ||
| Opo ms | 12862 | 285 | ||
| Optimist ms | 16204 | 287 | ||
| Ora ms | 10406 | 289 | ||
| Ora 2 d | 8557 | 291 | ||
| Orania ms | 15669 | 293 | ||
| Orania ds | 12841 | 295 | ||
| Oranus mt | 18878 | 297 | ||
| Oranus m | 12513 | 299 | ||
| Orastein m | 301 | |||
| Orator mt | 18779 | 303 | ||
| Orator mt | 17563 | 305 | ||
| Orator mt | 13079 | 307 | ||
| Orbit m | 11006 | 309 | ||
| Ordinat ms | 12567 | 311 | ||
| Oregon Express m | 11075 | 313 | ||
| Oregon Express m | 9937 | 315 | ||
| Orfor d | 8201 | 317 | ||
| Oria d | 7954 | 319 | ||
| Orient ms | 14056 | 321 | ||
| Orient ms | 13834 | 323 | ||
| Orinoco m | 12669 | 325 | ||
| Orion m | 11912 | 327 | ||
| Orion ms | 15025 | 329 | ||
| Orion mt | 10143 | 331 | ||
| Oris d | 12138 | 333 | ||
| Orizaba ms | 13736 | 335 | ||
| Orkanger ms | 19801 | 337 | ||
| Orkanger mt | 16709 | 339 | ||
| Orkanger mt | 13375 | 341 | ||
| Orkanger m | 9281 | 343 | ||
| Orkdalsfjord m | 345 | |||
| Orkla m | 8986 | 347 | ||
| Orkla d | 7593 | 349 | ||
| Orkla d | 3451 | 351 | ||
| Orm Jarl ms | 16006 | 353 | ||
| Orm Jarl d | 11342 | 355 | ||
| Orm Jarl d | 8353 | 357 | ||
| Ormen Lange m | 11341 | 359 | ||
| Ormlund ms | 14693 | 361 | ||
| Ormsjø ms | 13239 | 363 | ||
| Oro Chief ms/mt | 18125 | 365 | ||
| Orone d | 5081 | 367 | ||
| Ortavågøy m | 11833 | 369 | ||
| Ortri d | 4893 | 371 | ||
| Ortwo d | 5089 | 373 | ||
| Orunda ms | 16200 | 375 | ||
| Orvik ms | 377 | |||
| Orvos mt | 16347 | 379 | ||
| Orwell dt | 8855 | 381 | ||
| Osa m | 5429 | 383 | ||
| Osan ms | 385 | |||
| Oscar m | 224 | 387 | ||
| Oscar II d | 3665 | 389 | ||
| Oscar II d | 14565 | 391 | ||
| Osco Anne ms | 20262 | 393 | ||
| Osco Beduin ms | 19711 | 395 | ||
| Osco Beduin mt | 18597 | 397 | ||
| Osco Bellona mt | 19607 | 399 | ||
| Osco Bellona mt | 18682 | 401 | ||
| Osco Castor ms | 19951 | 403 | ||
| Osco Cecilia mt | 19105 | 405 | ||
| Osco Sailor ms | 19939 | 407 | ||
| Osco Sailor mt | 17677 | 409 | ||
| Osco Chief ms | 20137 | 411 | ||
| Osco Sea ms | 19946 | 413 | ||
| Osco Sierra mt | 17430 | 415 | ||
| Osco Spirit mt | 17575 | 417 | ||
| Osco Star ms | 20711 | 419 | ||
| Osco Stream ms | 20195 | 421 | ||
| Osco Stream mt | 18950 | 423 | ||
| Osco Stripe mt | 17468 | 425 | ||
| Osco Sun ms | 19940 | 427 | ||
| Osco Surf mt | 19016 | 429 | ||
| Osco Surf mt | 14703 | 431 | ||
| Osco Surf mt | 17079 | 433 | ||
| Osco Sword ms | 19945 | 435 | ||
| Osco Sword ms | 15875 | 437 | ||
| Oseberg | 439 | |||
| Osen m | 9467 | 441 | ||
| Osholm m | 443 | |||
| Oskar III m | 445 | |||
| Oskar Johan ms | 18218 | 447 | ||
| Oskar Floa m | 12650 | 449 | ||
| Oskarsborg-Narvik m | 11015 | 451 | ||
| Oskarsborg-Narvik m | 10538 | 453 | ||
| Oslo ms | 14740 | 455 | ||
| Oslo d | 9432 | 457 | ||
| Oslo III m | 7750 | 459 | ||
| Oslo VI m | 8585 | 461 | ||
| Oslo VII m | 9045 | 463 | ||
| Oslo X m | 9073 | 465 | ||
| Oslo Countess ms | 20559 | 467 | ||
| Oslo Lady ms | 20756 | 469 | ||
| Oslo Princess ms | 20599 | 471 | ||
| Oslo Salvator ms | 17914 | 473 | ||
| Oslofjord ms | 18155 | 475 | ||
| Oslofjord m | 10500 | 477 | ||
| Osloskøyta m | 10802 | 479 | ||
| Osnes m | 6023 | 481 | ||
| Osnes II m | 483 | |||
| Osprey ms | 19276 | 485 | ||
| Osterøy m | 487 | |||
| Ostfriesland ms | 20076 | 489 | ||
| Ostra m | 6226 | 491 | ||
| Ostra Pall ms | 15668 | 493 | ||
| Ostringen m | 2602 | 495 | ||
| Osund m | 497 | |||
| Osvald m | 499 | |||
| Otegra ms | 11054 | 501 | ||
| Oter m | 5224 | 503 | ||
| Oter I d | 9666 | 505 | ||
| Oternes m | 10091 | 507 | ||
| Othander d | 9448 | 509 | ||
| Othelius Nilsen ms | 14589 | 511 | ||
| Otrøying ms | 16543 | 513 | ||
| Otta m | 12277 | 515 | ||
| Ottar Jarl m | 11560 | 517 | ||
| Ottar Jarl d | 8888 | 519 | ||
| Otteid d | 11397 | 521 | ||
| Otteren m | 3877 | 523 | ||
| Ottersøy m | 9490 | 525 | ||
| Ottersøy m | 527 | |||
| Otto ms | 529 | |||
| Our Boys m | 9169 | 531 | ||
| Oval m | 11383 | 533 | ||
| Ove m | 10864 | 535 | ||
| Ove Jan m | 4393 | 537 | ||
| Ovoll ms | 15950 | 539 | ||
| Owl Trader ms | 20359 | 541 | ||
| Owners Pride m | 6379 | 543 | ||
| Ozori ms | 13429 | 545 |