What is maneuver number 19?

• A. Propeller reverse
• B. Line
• C. Left and right to center
• D. Pairs alternate left and right at the rail

Answer: (D)

This item focuses on a shipboard drill movement along the rail. Number 19 describes pairs alternating left and right at the rail, a pattern sailors use to move safely and in sync as the deck rolls. The idea is to keep balance and spacing by having partners switch sides in a controlled way, so the crew remains clear of the rail edge and maintains uniform movement.

Propeller reverse is an engine action, not a crew drill along the rail. A single line isn’t a movement pattern, and left-and-right-to-center refers to a different style of formation command. The item’s description, pairs alternating left and right at the rail, matches a standard rail-handling drill sequence, which is why it’s the best choice.