What statement is true concerning the door interlock devices associated with a winding drum or traction drive passenger elevator onboard ship?

Correct Answer: Option B — Door interlocks are used to prevent elevator operation if the doors are still open and only allow elevator operation if the doors are proved closed.

Under USCG National Maritime Center examination standards, the accepted correct answer is: Door interlocks are used to prevent elevator operation if the doors are still open and only allow elevator operation if the doors are proved closed..