When launching an inflatable life raft, you should make sure that the operating cord is __________.

Correct Answer: Option A — fastened to some substantial part of the vessel

The operating cord, or painter, must be secured to a substantial part of the vessel before launching an inflatable life raft. This ensures that as the raft inflates, it remains tethered to the ship, preventing it from drifting away and allowing the crew to board safely from the vessel.