A propeller of 5~65m in diameter, having a mean pitch of 4~88m, turning at 72 rpm, at a speed of 11 knots (339~79m/min), will give （） of apparent slip.

In moving forward, a ship imparts forward motion to the...

单项选择题In moving forward, a ship imparts forward motion to the water at the stems, this is known as （）.

Wake varies considerably with the form of the vessel, b...

单项选择题Wake varies considerably with the form of the vessel, but, generally speaking, the bluffer the ship （） the wake value.

When viewed from astern, if the propeller revolves in a...

单项选择题When viewed from astern, if the propeller revolves in a clockwise direction when going ahead, it is known as （）.