Maritime Glossary
Source-cited definitions for shipping, engineering, navigation, and regulatory terminology. Confidence-scored and verified against primary IMO, IHO, and industry sources.
- NOxnitrogen oxides · nitric oxide · NO · NO₂
- Nitrogen oxides formed during high-temperature combustion in marine engines, subject to MARPOL Annex VI Tier I/II/III limits.
- environmentregulationengineeringhigh confidence
- Nautical MileNM · nmi · sea mile
- The unit of distance used in navigation, equal to 1,852 metres, defined as one minute of arc of latitude.
- navigationseamanshiphigh confidence
- Notice of ReadinessNOR
- Written notice from the master declaring the vessel has arrived and is ready in all respects to commence cargo operations.
- commercialcharteringlegalhigh confidence