What is the GPM for a 1 1/2" nozzle outside the skin of the ship?

The correct answer, 125 gallons per minute (GPM) for a 1 1/2" nozzle outside the skin of the ship, corresponds with standard firefighting practices. This figure is based on hydraulic calculations and guidelines used in shipboard firefighting systems. Typically, a 1 1/2" nozzle is designed to deliver an effective flow rate that allows firefighters to combat fires efficiently in a maritime environment.

The choice of 125 GPM ensures a balance between sufficient pressure and flow to effectively disperse water or firefighting foam over an area, thereby enhancing the ability to extinguish fires or cool hot surfaces. This flow rate is considered optimal for managing fire scenarios that may arise, especially when dealing with combustible materials that can be present on a ship. Understanding these flow rates is crucial for damage control personnel to perform their duties effectively during emergency situations.