单项选择题
A.bases
B.gudgeons
C.pintles
D.rudder lugs
单项选择题 The owner or Master of a towing vessel shall ensure that all tests and inspections of gear take place and are logged（）.
单项选择题 The owner or Master of a towing vessel shall ensure that all tests and inspections of gear take place and are logged（）.
单项选择题 The irregular black line around a charted light such as Race Rock Light indicates that it is （）.