单项选择题
Based on your 2209 fix，which would be a warning that you are being set down on Block Island Sound South Entrance Obstruction Lighted BIS Buoy? （）
A.Decreasing loran readings on 9960-W B.Visual bearings of Montauk Point Lt. changing to the left C.Increasing bearings of Southeast Point Light D.Decreasing soundings
单项选择题 Based on a DR，at approximately 1817 you would expect to（）.
单项选择题 At the master gyrocompass，the compass card is attached to the（）.
单项选择题 At sea，we can use（）to fix the ship’s position.
