单选题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?（）A7 knotsB10 knotsC15 knotsD20 knots
单选题
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?（）
A
7 knots
B
10 knots
C
15 knots
D
20 knots
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