A fishing vessel casualty must be reported to the Coast Guard if it involves（）.

A safe fuel system must（）.

Cargo transfer operations on a tank vessel need NOT be stopped when（）.

After sending a message describing the symptoms of an ill crew member，you receive a message containing the code MRL. This means（）.

For the purposes of cargo oil containment，the fixed container under the manifold of an eight-inch loading line must hold a minimum of（）.

Permanent magnetism is caused by（）.

Entries should be made in a Ro-Ro vessel’s cargo-securing device record book for（）.

A heavy steel curved arch constructed athwartships and above the after deck on a towing vessel is sometimes called a（）.

A green buoy has a yellow triangle on it. This is a(n)（）.

An obstruction on a helodeck is any object that might present a hazard to the（）.