The correct answer is D. Start the emergency fire pump remotely from the bridge or emergency gear locker. In a vessel with a periodically unattended machinery space, the emergency fire pump should be capable of being started remotely from the bridge or another accessible location outside the engine room, such as the emergency gear locker. This allows the crew to activate the fire main system and fight the fire without having to enter the hazardous engine room space. The other options are incorrect because they do not provide the necessary remote start capability for the emergency fire pump. Starting the engine room fire pump from the bridge (A) or chief engineer's office (C) would not work if the engine room is inaccessible. Remotely starting the emergency fire pump from the chief mate's office (B) is also not the correct procedure.