| ACRONYM | FULL WORDING | COMMENT |
| NAABSA | Not Always Afloat But Safely Aground | Used about tidal ports, when vessels are lying aground on a fair bottom, at low tide |
| NB, NBDG | Newbuilding | |
| NHC | No Heat Crude | Crude oil not requiring any heating on board |
| NKAWW | What can you offer ? | The unique five letter code-word surviving from the "New Boe Code" in use before the telex era (sometimes : WCUO) |
| NOR | Notice Of Readiness | By custom, the NOR must be in writing (letter, telex, radio message, etc...) and must be delivered at the office of the addressee |
| NRT | Net Registered Tonnage | Volume of the hull less space occupied by machinery, cabins and bunkers, in units of 100 Cbf (2,8317 Cbm) |
| NT, ONT | (Ordinary) Neap Tide | HWONT describes the draft available at high water (HW) in an average neap tide |
| NWS | Barème de référence des frets pétroliers | Schedule of tanker freights published by "Worldscale" and used as a reference |
| NYPE | New York Produce Exchange (Time Charterparty) | NYPE is mostly used as a reference to the T/C originally issued by the New York Produce Exchange, and later on taken over by ASBA (Association of Ship Brokers & Agents, New York) |
