Which may ignite fuel vapors?（）

The most likely time for oil pollution while bunkering is when（）.

Good anchorage may be obtained anywhere in this water area，the bottom being generally mud and sand，vessel may have（）.

The radiotelegraphy safety messages for condition indicating distress，urgency and safety，respectively，are（）.

The winch is liable（）worn-out in this way.

Which mooring line has the least elasticity?（）

To safely anchor a vessel there must be sufficient scope in the anchor cable. Scope is the ratio of（）.

Which term describes a part of a natural fiber line?（）

Which measure should NOT be taken to reduce the pounding of a vessel in a head sea?（）

Which method of adjusting mooring lines is MOST useful for leaving a boat free to rise and fall with the tide?（）