A、A.a 2-second blast every 20 seconds
B、B.a 4-second blast every 20 seconds
C、C.an 8-second blast every 30 seconds
D、D.a 10-second blast every 30 seconds
更多“A jack-up drilling unit elevated on the Outer Continental Shelf must have a fog horn that will sound（）.”相关的问题
A、turn off all lights that interfere with the navigation lights B、turn on all available working lights on deck C、ring the bell rapidly for five seconds once a minute D、display two black diamonds in a vertical line during the day
A、reduce spud can bearing pressure B、keep the unit level and reduce overloading C、reduce stresses on the hull D、minimize the potential for punch-through
A、A.turn into the seas B、B.turn to be parallel to the seas C、C.reduce speed D、D.increase speed
A、Jack down one leg at a time B、Jack up first，then down C、Undog doors to the engine room D、Assemble all personnel on the main deck
A、is drilling on the Outer Continental Shelf B、moves to a new drilling location in U-Swaters C、engages in a voyage to a port of another country which is a party of MARPOL D、All of the above
客服
TOP
查看正确答案
