单项选择题
A towline should be fastened to（）.
A.the chocks at the bow of a towed vessel B.the most forward，centermost point of a towed vessel such as a sturdy bow rail C.the mast of a towed sailboat D.a secure fitting near the bow of the towed vessel
单项选择题 A towing vessel’s fire detection system may be certified to comply with the Coast Guard’s towing vessel fire protection regulations by（）.
单项选择题 A towing light is（）.
