A tug is “in irons” when held in a fixed position by（） A: the weight of its tow，its being anchored，or grounded B: the weight of its towing hawser on the bottom C: an adverse current D: lack of power or an engine breakdow

A tug is to assist in docking an oceangoing vessel on a hawser. The greatest danger to the tug is （）. A: from the ship's propeller when making up aft B: from being overrun if making up forward C: hull damage while alongside passing a hawser D: getting in a tripping positio