What fuze is used in the 40 mm HEI PGU-9 C/B round?

The FMU-154/B fuze is specifically designed for use in the 40 mm High-Explosive Incendiary (HEI) PGU-9 C/B round. This fuze incorporates advanced features, such as programmable detonation capabilities, allowing for varying detonation times based on the application. Its design is optimized for the 40 mm projectile, ensuring that detonation occurs at the desired moment, enhancing the effectiveness of the round against targets.

The FMU-154/B is particularly significant due to its versatility in engaging a range of targets, which aligns with the operational requirements of the PGU-9 C/B round. This fuze can be set to operate in different modes, enabling it to be effectively used against both aerial and ground targets by programming the appropriate detonation reaction.

In contrast, the other fuzes mentioned are not compatible with the PGU-9 C/B round. Each has its specific use case within different munitions or configurations, thus confirming that the FMU-154/B is the correct choice for this particular 40 mm round.