n/ms no marks 无标记
nk japan register of shipping 日本船级协会
ngi norwegian guarantee institute 挪威保赔协会
n.b. nota bene (take notice) 注意
nc non-committal 不承担义务
nlt no later than 不迟于
oa over aged 超龄的
oa over all 全部的,总的
o/a owner's account 船东帐目
o/a on/about 于/大约
oap over aged premium 船舶超龄保险
oc open charter 货港未定的租船合同
ocp over land common point 公共指定的内陆点
oct october 十月
ok all correct 对
oo owner's option 船东选择
opp opposite 对面
osd open shelter deck ship 无遮蔽甲板船
ot over time 加班
owrs owners 船东
o/o order of 指示指定