| O Kate | 32 | 682478 | 4849 | Mceachern, Robert J | CL |
| O Kate | 32 | 682478 | 153850 | Mceachern, Robert J | IN |
| Oakley'S Boat | 18 | MS8144BS | 185275 | Hyland, Meaghan J | B1 |
| Oasis | 32 | MS9795DR | 129 | Aldrovandi, Michael A | CL |
| Obsession | 32 | 948603 | 176938 | Cantella, Luke E | B1 |
| Ocean Blue | 75 | 612315 | 169115 | F/V Ocean Blue Inc (Alexander-Nevells, Stacy) | ON |
| Ocean Boy | 74 | 544841 | 155439 | Ocean Boy, Inc (Alexander, Warren) | B2 |
| Ocean Fox | 77 | 1033251 | 181609 | Dunlop, Greg | B2 |
| Ocean Gold | 78 | 1037847 | 150185 | Ocean Gold Inc (Alexander, Warren) | ON |
| Ocean Hunter | 45 | 675834 | 1149 | Mello, Kevin M | CL |
| Ocean Hunter | 81 | 600617 | 181611 | Dunlop, Greg | B2 |
| Ocean Justice | 21 | MS1847BJ | 175710 | Zahner, Benjamin | B1 |
| Ocean Leader | 84 | 617297 | 181613 | Dunlop, Greg | B2 |
| Ocean Life | 34 | 1107832 | 176838 | Ocean Life Inc (Woollam, Gordon F) | B1 |
| Ocean Master 27 | 26 | MS9869BM | 181748 | Hendrickson, Brandon | B1 |
| Ocean Pearl | 85 | 623205 | 5148 | Felcal Fishing Corp - Santa Queen | EO |
| Ocean Pearl | 85 | 623205 | 180785 | Atlantic Harvesters Llc (Krauss, Kevin S) | B2 |
| Ocean Pride | 79 | 1330866 | 155209 | Ocean Pride, Inc. (Alexander, Warren) | ON |
| Ocean Princess | 81 | 916992 | 183045 | F/V Silver Sea Llc (Martin, Samuel A) | B2 |
| Ocean Prowler | 84 | 1120035 | 150189 | Ocean Prowler Inc (Alexander, Warren) | ON |
| Ocean Prowler | 77 | 594025 | 181608 | Dunlop, Greg | B2 |
| Ocean Queen | 79 | 1312950 | 182623 | Ocean Queen Inc (Alexander, Warren) | ON |
| Ocean Rancher | 44 | 595889 | 69166 | Ingham, Bruce W | B1 |
| Ocean Reporter | 44 | 674459 | 173673 | Lee, Bill J | B1 |
| Ocean Runner | 18 | MS2088BJ | 84893 | Gilbert, Daniel F | B1 |
| Ocean Scout | 78 | 1076413 | 183689 | New Ocean, Llc (Vinjerud, Lars Ii) | B2 |
| Ocean Scout | 20 | MS9531KS | 6974 | Eliopoulos, George M | CL |
| Ocean Venture | 71 | 1251957 | 184840 | Stevens, Jeffrey | B2 |
| Ocean Venture | 71 | 1251957 | 181835 | Matthews, Benjamin | B2 |
| Ocean Vue | 42 | 1284147 | 180227 | Ocean Vue Charters Corp (Morse, Thomas W) | B1 |
| Ocean Wave | 68 | 280172 | 160791 | Ocean Wave Scallop Co Inc (Alexander, Warren) | ON |
| Oceanic | 84 | 930009 | 160983 | Majestic Fishing Llc | ON |
| Odessa | 40 | 554354 | 149313 | Barrett, Timothy A | ON |
| Odessa Iii | 25 | MS0858BC | 179393 | Clayton, Brett A | IN |
| Odonto Blast | 33 | 696195 | 183661 | Keen, Sean | B1 |
| Odysea | 31 | 928787 | 139537 | Wilkins, Ralph J | B1 |
| Odyssey | 22 | MS9219HY | 17198 | Pickering, Robert P | B1 |
| Odyssey | 40 | 1185414 | 183725 | Hill, Edwin J | B1 |
| Odyssey | 88 | 621918 | 184223 | Odyssey Scallops Inc (Carillo, Vincent Jr.) | B2 |
| Off Duty | 36 | 1148584 | 175084 | Sohm, Matthew | B1 |
| Off Piste | 29 | CT2121BE | 183874 | Gillis, Edward M | B1 |
| Off Season | 24 | MS0413JD | 180402 | Devlin, Jeffrey P | B1 |
| Off The Hoof | 39 | FL4549TL | 185595 | Hill, Lawrence D | B1 |
| Off Watch | 25 | NH2573UX | 185606 | Despres, Glen E | B1 |
| Off-Piste | 36 | 1308626 | 185272 | Off-Piste Offshore Llc (Kremidas, John A) | B1 |
| Offline | 28 | 1250425 | 156119 | Demello, John L | B1 |
| Offshore | 30 | 932790 | 181278 | Vaill, James B | B1 |
| Offshore Office | 41 | 1211633 | 166856 | Woods, William | B1 |
| Oh Shore | 23 | MS7083CN | 184665 | Wayrynen, Christopher J | B1 |
| Ohana | 23 | MS4288BJ | 170170 | Ochoco, Aris J | B1 |
| Old Coot | 42 | RI2235Y | 164648 | Cockeast Fisheries Inc (Borden, Charles R) | OL |
| Old Dog | 25 | MS3396BM | 183388 | Ewing, Christopher | B1 |
| Old Dogs | 34 | MS8079BS | 181915 | Niehoff, Karl R | B1 |
| Old Glory | 21 | MS4252BR | 185031 | Chatterton, Troy | B1 |
| Old Glory | 24 | MS7670BL | 147 | Carlson, Alisha M | CL |
| Old Glory | 42 | 1210671 | 3735 | Piper, David G Jr. | CL |
| Old Oil | 38 | 1219615 | 185793 | Mckim, William | B1 |
| Old Salt | 17 | MS1969BW | 182831 | Baldwin, William E Jr. | B1 |
| Old School | 23 | MS0107JH | 179449 | Hartman, Jonathan A | B1 |
| Olde America | 38 | MS0007FH | 3659 | Hillier, Pingree F Ii | CL |
| Ole Biddy | 22 | MS9025BD | 175492 | Lawrence, William R | B1 |
| Olivia Leigh | 27 | 1319191 | 162517 | Perette, Jon A | B1 |
| Olivia Catherine | 72 | 533196 | 158402 | Ksj Seafood Inc (Reposa, Peter A) | ON |
| Olivia Mae | 33 | MS9560BR | 183322 | Niden, Adam V | B1 |
| Olivia Paige | 33 | 626135 | 4056 | Loparto, Garrett W | CL |
| Olivia Paige | 33 | 626135 | 138958 | Stohr, Olivia P | CL |
| Olympia | 71 | 684132 | 177053 | Walsh, Michael | ON |
| Omash | 19 | MS5778BF | 170510 | Savage Fisheries Llc (Fernandes, Glen A) | B1 |
| On Again | 24 | MS8707ZB | 150518 | Olival, Thomas | B1 |
| On Call | 32 | 912993 | 181089 | Novello, Dominic M | B1 |
| On Edge | 27 | 1171939 | 175903 | Cerra, Salvatore | B1 |
| On Edge | 43 | RI7810X | 182203 | Allie Mae Fisheries Llc (Gilio, Jonathan P) | B1 |
| On The Beam | 26 | 1092875 | 164886 | Driscoll, Thomas D | B1 |
| On The Edge | 17 | MS8189BT | 137406 | Passanisi, Michael A | B1 |
| On The Fly | 24 | MS0063RS | 139286 | Sigler, James R | B1 |
| On The Fly | 26 | MS0429GB | 185010 | Burns, Gregory T | B1 |
| On The Fly | 20 | MS7363BK | 185679 | Simonsen, Tucker | RR |
| On The Right Track | 35 | 1243231 | 181654 | Milanoski, Michael R | B1 |
| On Time | 35 | MS7728BD | 94191 | Koutalakis, Demetrios M | B1 |
| On Time | 34 | MS7728BD | 94191 | Koutalakis, Demetrios M | B1 |
| On Your Mark | 31 | 1089009 | 179388 | Cassola, Mark S | B1 |
| One Last Cast | 30 | MS4871BK | 180392 | Folz, Ralph J | B1 |
| One More Cast | 23 | MS1203RD | 171976 | Daly, Robert A | B1 |
| One Particular | 20 | MS5919KM | 101962 | Baker, Kenneth W Jr. | B1 |
| One Shot | 23 | MS3274KN | 184927 | Hickey, Mark C | B1 |
| One Shot | 23 | MS8042BR | 184501 | Smith, Jared | B1 |
| Online | 23 | MS7950AM | 172017 | Oliver, Michael H | B1 |
| Only Fins | 23 | MS1978BS | 184803 | Barros, Michael F | B1 |
| Only Girl | 34 | MS0013W | 1439 | Kerrigan, William F | CL |
| Onnered | 62 | 266306 | 183551 | H&L Axelsson Inc (Axelsson, Dan) | B2 |
| Ono | 32 | 906094 | 185750 | Wiggin, Zachary C | B1 |
| Open Bar | 30 | MS2017NN | 185761 | Nanni, Anothony | B1 |
| Ophelia | 15 | MS4649BS | 184857 | Hanks, Christopher J | B1 |
| Oppor-Tuna-Ty | 58 | 1307784 | 182022 | Kennedy, Christopher M | B1 |
| Opportunaty | 24 | MS4122TC | 131618 | Connors, Charles J | B1 |
| Opportunaty | 42 | 648981 | 183950 | Higgins, Luke H | B1 |
| Opportune | 54 | 1205534 | 171624 | Axelsson, Paul R | B1 |
| Optimus | 27 | MS6703BG | 178830 | Papi, Ryan J | B1 |
| Opus X | 26 | MS0333MD | 171945 | Dusseault, Mark | B1 |
| Orca | 12 | MS2212BS | 184854 | Vaccarello, Richard C | B1 |
| Orion | 82 | 611248 | 163993 | Princess Diana 1 Inc | ON |
| Orion | 38 | 1098123 | 174848 | Hanson, Peter G | B1 |
| Orion | 92 | 1270244 | 173201 | Ohara Corporation (Enoksen, Ronald) | ON |
| Oscar | 20 | MS1969TL | 172333 | Lima, Tyler M | B1 |
| Osprey | 108 | 683328 | 120027 | Irish Venture, Inc. (Mullen, Julia) | OL |
| Osprey | 28 | MS0527GC | 184096 | Graney, Robert N Jr. | B1 |
| Osprey | 35 | 666159 | 163232 | Kissell, Shane S | B1 |
| Osprey | 35 | 631309 | 178217 | Viprino, Don A | B1 |
| Osprey | 39 | NH2612JM | 185004 | Crawshaw, Geoffrey K | B1 |
| Osprey | 35 | 932787 | 93804 | Corbett, Stephen L Jr. | B1 |
| Ouga Chaka | 24 | MS5945BG | 178700 | Dore, Anthony | B1 |
| Ouija | 23 | MS7130BA | 138930 | Miszkin, Gerald S | B1 |
| Our Boat | 20 | MS5599BM | 182801 | Parisi, Jonathen | B1 |
| Our Delight | 23 | MS4344BU | 185695 | Gauthier, Robert R | B1 |
| Out N About | 15 | MS0160CC | 160993 | Chabot, Stephen M | B1 |
| Out Of Bounds | 26 | MS5014KM | 104003 | Chisholm, Philip A | B1 |
| Outa School | 21 | NH4485BL | 182830 | Love, Stephanie | B1 |
| Outcast | 31 | MS9493AJ | 160132 | Wilmes, Raymond R | B1 |
| Outer Limits Iii | 40 | 1225738 | 2458 | Duggan, Frank J Jr. | CL |
| Outlander | 26 | MS2258BJ | 6246 | Elliott, Scott C | CL |
| Outlaw | 51 | 557860 | 182242 | Nolan, Max M | B1 |
| Outnumbered | 46 | 1266136 | 185018 | Colby Lobster Inc (Colby, Jason M) | B1 |
| Outnumbered | 26 | MS3734BP | 184432 | Jeffery, Bryan J | B1 |
| Outnumbered | 23 | MS2317BL | 180950 | Feingold, Elijah R | SL |
| Outnumbered | 23 | MS2317BL | 180951 | Feingold, Elijah R | B1 |
| Outta Line 3 | 25 | MS4695AM | 176812 | Valasktgis, John M | B1 |
| Ouzo | 20 | MS6144ZE | 151850 | Fondulis, Nick W | B1 |
| Over Kill | 44 | 1245411 | 172342 | Wotton, James P | B1 |
| Over Time | 12 | MS5312AU | 181312 | Conners, Michael | RR |
| Over Under | 26 | MS0211RL | 178186 | Lowell, Robert N | B1 |
| Overdraft | 30 | 1140579 | 179889 | Gemme, Andrew P | B1 |
| Overtime | 25 | MS4648BU | 181386 | Pimental, Jacob V | B1 |
| Overtime | 35 | MS2249BB | 1003 | Mahoney, Dennis | CL |
| Overtime | 24 | RI2553Y | 184958 | Correia, Christopher N | B1 |
| Owls Nest | 86 | 1288066 | 182229 | Owls Nest Llc (Tambor, Matthew D) | B2 |
| Oyibo | 26 | MS8837KL | 161066 | Davis, Christopher T | B1 |
| Oyster Catcher | 24 | MS5685BP | 182285 | Cosgrove, Liam | SS |
| Oyster Catcher | 36 | MS4324D | 86264 | Husselton Head (Canha, Jeffrey P) | SR |
| Oz | 28 | 1316500 | 180971 | Mcinnis, Martin | B1 |