A (22) | B (29) | C (39) | D (16) | E (14) | F (27) | G (10) | H (16) | I (18) | J (1) | K (6) | L (26) | M (18) | N (8) | O (5) | P (24) | R (10) | S (45) | T (14) | U (11) | V (9) | W (6)
Glossary term Description
open-sided container

Container with sides that can be opened, usually closed with tarpaulin and bows

OOW

officer of the watch

OEM

original equipment manufacturer

OECD

Organisation for Economic Co-operation and Development

NTSB

National Transportation Safety Board (US)

nt

net tonnage. The residual tonnage after the allowances for engine room, crew spaces and bridge have been deducted from the gross tonnage

NOx

oxides of nitrogen

Northern Sea Route

A shipping lane officially defined by Russian legislation from the Kara Sea to the Pacific Ocean specifically running along the Russian Arctic coast from Kara Gates Strait between the Barents Sea and the Kara Sea, along Siberia, to the Bering Strait. The entire route lies in Arctic waters and within Russia's Exclusive Economic Zone (EEZ). Parts are free of ice for only two months per year.

NOAA

(US) National Oceanic & Atmospheric Administration

nm

nautical miles. Historically, a nautical mile represented the distance spanned by one minute of arc of the Earth (north-south). Now formalised as 1,852 metres