单项选择题 On a single-screw vessel，when coming port side to a pier and being set off the pier，you should（）.

单项选择题 Mooring with two bow anchors has which major advantage over anchoring with one bow anchor? （）.

单项选择题 Leg penetration to depths which require pullout forces greater than that which can be supplied by the buoyancy of the hull may exist in（）.