... where the steering gear is manually operated, one complete turn of the hand wheel must correspond to at least 3° of rudder angle ... The power drive must not actuate the hand wheel; there shall be a device to prevent the return of the hand wheel for any rudder position when the manual drive is engaged automatically.
Hand-operated sliding doors may have a horizontal or vertical motion. It shall be possible to operate the mechanism at the door itself from either side, and from an accessible position above the bulkhead deck, with an all round crank motion, or some other movement providing the same guarantee of safety and of an approved type.
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