Which organization must approve any fixed fire suppression system?

The United States Coast Guard (USCG) is the organization responsible for approving fixed fire suppression systems used on vessels. The USCG sets forth regulations and standards to ensure safety at sea, including those that pertain to firefighting equipment. This encompasses the approval of fixed fire suppression systems to ensure that they meet specific safety and operational guidelines critical for the protection of life and property on board.

Fire suppression systems must undergo rigorous testing, and their design must comply with USCG regulations to ensure effectiveness in preventing or controlling fires on vessels. This approval process involves assessing the system's performance, reliability, and suitability for maritime environments. By requiring USCG approval, these regulations help ensure that vessels are equipped with fire suppression systems that are capable of functioning effectively in emergency situations.

Other organizations listed have their own regulatory roles, but they do not specifically focus on the approval of fire suppression systems on vessels in the same way the USCG does. Thus, USCG's approval is mandatory for compliance and safety at sea.