What specific phrase does the POOW call as a signal before the colors are set?

The phrase "First call. First call to colors" serves as a formal signal indicating that preparations for the colors ceremony are about to begin. This specific wording establishes clear communication among the crew members and ensures that everyone is alert and ready for the ceremonial procedure. The repetition of "First call" reinforces the urgency and importance of the upcoming event, allowing personnel to complete any last-minute tasks in preparation for raising the colors.

The other phrases, while similar, do not include the essential element of a repeated "First call," which is crucial in naval protocol for signaling the initiation of specific actions. By specifying that it is a "first call," the phrase emphasizes that this is the initial announcement rather than a subsequent reminder, which is key in a formal context like this. This helps to maintain order and discipline during ship ceremonies where timing and readiness are critical.