N/MS No marks 無標記
NK Japan register of shipping 日本船級協(xié)會
NGI Norwegian Guarantee Institute 挪威保賠協(xié)會
N.B. Nota bene (take notice) 注意
NC Non-committal 不承擔義務
NLT No later than 不遲于
OA Over aged 超齡的
OA Over all 全部的，總的
O/A Owner's account 船東帳目
O/A On/about 于/大約
OAP Over aged premium 船舶超齡保險
OC Open Charter 貨港未定的租船合同
OCP Over land common point 公共指定的內陸點
OCT October 十月
OK All correct 對
OO Owner's option 船東選擇
OPP Opposite 對面
OSD Open shelter deck ship 無遮蔽甲板船
OT Over time 加班
OWRS Owners 船東
O/O Order of 指示指定