The only cylindrical chart projection widely used for navigation is the（）.

单项选择题The notice which is based on original information is indicatedby（）nexttothenotice number.

A.a star
B.a dot
C.a dash
D.a circle

单项选择题What areessentialto ensure the effective implementationoftheship securityplan?（）

A.Controlling access to the ship
B.Training and drills
C.Controlling the restrictedareas
D.Monitoring the ship at times

单项选择题Which factor has the greatest effect on the amount of gain required to obtain a fathometer reading?（）

A.Salinity of water
B.Temperature of water
C.Atmospheric pressure
D.Type of bottom

单项选择题The standards of physical and medical fitness established by the Party shall not ensure that seafarers（）.

A.have the physical capability to fulfill all the requirements of the basic training
B.demonstrate adequate hearing and speech to communicate effectively
C.are suffering from any medical conditions likely to be aggravated by service at sea
D.have no medical condition that will prevent the effective e and safe conduct of their routine and emergency duties on board

单项选择题The maneuverability of the ship is considered（）if the following criteria are complied with.

A.satisfactory
B.satisfactorily
C.smooth
D.smoothly