A tide is called diurnal when（）.

When the wave period and the apparent rolling period are the same（）.

（）is halfway between the forward and after perpendiculars and is reference point for vessel construction.

The mean draft of a ship is the draft（）.

（）is where the crew eat their meals.

Which wind results from a land mass cooling more quickly at night than an adjacent water area?（）

Despite the rising importance and great convenience of the gyrocompass,the magnetic compass still retain its importance because of its（）.

（）is on the panel of radar.

Your vessel is docking, but not yet alongside. Which line will be the most useful when maneuvering the vessel alongside the pier?（）.

Berthing means bringing a vessel to her berth until（）.