What is the first action to be taken 5 minutes before sunrise?

The correct action to be taken 5 minutes before sunrise is to close up the prep pennant. This procedure is important as the prep pennant serves as a signal to indicate that a ship is preparing to get underway. Closing up indicates readiness for the day’s operations and that the shift from night operations to day operations is imminent.

Following this signal helps ensure that all personnel are aware of the upcoming activities and that the crew can prepare for the transition. The timing of this action is crucial, as it aligns with the established customs and routines of maritime operations, reinforcing situational awareness and communication among the crew.