How many Chemlights are required for the swimmer harness?

The correct number of Chemlights required for the swimmer harness is four. This quantity is established to ensure sufficient visibility for the swimmer in low-light conditions. Each Chemlight serves as a personal marking device, assisting in the identification of the swimmer's location, especially during rescue operations at night or in poor visibility scenarios. The use of four allows for effective coverage, ensuring that the swimmer's presence can be easily recognized by team members, improving safety and coordination during missions.

Having the right amount of Chemlights is critical to complying with operational guidelines and enhancing the overall effectiveness of rescue scenarios. Each additional light enhances the swimmer's visibility, but with four being the standard requirement, it balances practicality and functionality.