What is the only safety device found on the FMU-124A/B fuze?

The FMU-124A/B fuze incorporates a safety device designed to prevent unintended detonation during handling and transportation. The pin serves as a critical component that secures the safety mechanism, ensuring the fuze remains inactive until it is properly armed for use. This helps protect personnel and equipment by minimizing the risk of accidental ignition during pre-launch and loading operations.

The other options, while they may seem relevant to safety concepts in munitions, do not apply specifically to the design and function of the FMU-124A/B fuze. Understanding how the pin operates within the fuze is essential for ensuring safe munitions management and handling.