单项选择题
A fairly accurate estimation of a ship’s position can be calculated by a technique known as（）.
A.dead reckoning B.pilotage C.great circle sailing D.geographic navigation
单项选择题 A fire has broken out on the stern of your vessel. You should maneuver your vessel so the wind（）.
单项选择题 A fire in a ballast pumproom can be brought under control with minimal impact on stability by（）.
单项选择题 A fire in the galley always poses the additional threat of（）.
