Maritime abbreviations
Speciel thanks to Ole Nørgaard who has contributed with his abbreviations.
| Entry | Explanation |
| J | Joule |
| jcc | Joint Cargo Committee |
| jcra | Joint Common Risk Agreement |
| Jen-Tho ror | Flap-ror udviklet af Thomsen & Thomsen i Marstal, roret/flappen virker i princippet som et Beckerror, se også Beckerror. |
| JKL | Juelsminde Kalundborg Linien |
| JLH | J.Lauritzen Holding |
| jpn | Japan |
| JR | Jugoslaw Register |
| jsa | Japanese Shipowners Association |
| jst | Japan Standard Time (GMT + 9). |
| Juk | Tværskibsstillet, aftagelig rorpind med styreliner, især til mindre fartøjer. |
| JUTTA | "Kælenavn for ""Stena Jutlandica"", Frederikshavn - Gøteborg" |