A.a blast of from five to seven seconds' duration B.a blast of from five to six seconds' duration C.a blast of from four to six seconds' duration D.a blast of from six to seven seconds' duration
A.have someone standing by B.make sure there is sufficient air within the locker C.de-energize the windlass D.All of the above
A.Dacron B.Nylon C.Esterlene D.Polypropylene
A.of B.to C.for D.on
A.of B.to C.on D.with
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