After riveting is completed, the joints on the shell of a vessel are generally made watertight by________.

All electrical appliances aboard a vessel should be grounded to ______.

All echo-sounders can measure the ______.

All dunnage planks and mats must be sent on board______commencement of loading．

All casualties such as personnel injuries or illness, oil spills, accidental fire, collision,stranding, and unusually severe weather damage, whether at sea, in port, or in shipyard, must be promptly ______ to the company.

Aircraft made forced______near position 23 o 32'N，110 o 13'E．

All accidents and damage to ship, equipment or personnel, must be _ in the vessel deck log.

After transferring a weight forward on a vessel, the draft at the center of flotation will _____.

After using a CO2 portable extinguisher, it should be ______.

After putting on a self-contained breathing apparatus, you open the air supply and hear acontinuous ringing of a bell. What does this mean?______.

After riveting is completed, the joints on the shell of a vessel are generally made watertight by________.