Fixed piping leads from the（）to various areas of the compartment to be flooded.

单项选择题When the ship is under attack by pirates,or terrorists,（）needs to be activated.

A.AIS
B.SSAS
C.SSP
D.SART

单项选择题Which of following physical abilities is not required as to the routine movement around a vessel?（）

A.Maintain balance and move with agility
B.Climb up and down vertical ladders and stairways
C.Open and close watertight doors
D.Take part in vessel evacuation procedures

单项选择题The information regarding ports such as buoyed channels,fairway,location and number of terminals,river channels,details of navigational marks,location of overhead bridges, underground cables etc. are shown in（）

A.small-scale charts
B.medium-scale charts
C.large-scale charts
D.natural scale charts

单项选择题On a weather map,a large letter “h” means（）

A.a high pressure area with cool, dry air and fair weather
B.a high pressure area with warm, moist air and inclement weather
C.horse latitudes, with rough seas and strong winds
D.a heavy squall line near the “H”

单项选择题There are often three parts in a weather report, not including（）

A.warning
B.general synopsis
C.forecast
D.traffic density