单项选择题
A.swing 35°right or left
B.remain locked in its last position
C.move to the mid-ship position automatically
D.jam against the rudder emergency stops
单项选择题 According to Regulations, a power driven auxiliary steering gear for a vessel capable of a 12 knot service speed, must be able to meet the rudder movement requirements at which of the minimum vessel speeds listed below?（）
单项选择题 According to Regulations, a power driven auxiliary steering gear for a vessel capable of a 20 knot service speed, must be capable of producing a rudder movement at which of the minimum speeds listed below?（）
单项选择题 The follow-up gear on an electro-hydraulic steering gear（）