Fall preventer devices (FPD)
Arrangements that provide a physical barrier to inadvertent on load hook release. These can be strops attached to a strong point other than the hook on the boat and to the fall block during launching and recovery procedures or an approved metal pin inserted in the hooks to prevent release. Nylon loop strops of sufficient safe working load are recommended as they can absorb shock loads and can be easily cut in an emergency. See also On-load release hooks.