What is the BEST conductor of electricity（）.

Which device is designed to automatically hold the load if power should fail to an electric winch?（）

Which fitting is used to connect the boom to the mast? （）

You are on watch and the Pilot has the conn.The Master has temporarily gone below.The Pilot orders a course change which you are certain will put the vessel into imminent danger.Your first action should be to（）.

In determining that the（）of the navigational watch is adequate to ensure that a proper look-out can continuously be maintained，the master shall take into account all relevant factors.

You are standing the wheelwatch on entering port and the Master gives you a rudder command which conflicts with a rudder command from the Pilot.What should you do（）.

While underway in thick fog you are on watch and hear the cry“man overboard”.Which type of maneuver should you make（）.

Orders of the Master to the officer of the watch which s/he must comply with are（）.

If at any time the officer in charge of the navigational watch is to be relieved when a manoeuvre or other action to avoid any hazard is taking place,（）.

What is the purpose of the limit switch on gravity davits?（）