Which of the following is NOT one of the types of fuze?

The type of fuze that is NOT typically recognized in military ordnance is combustion. A fuze is a device that initiates an explosive charge, and there are several well-established categories based on the method of activation.

Impact fuzes activate when there is a direct collision with a target, making them very effective for bombs and artillery shells that are designed to detonate upon striking an object. Proximity fuzes use radar or other sensing technologies to detonate when an object is close to the target, thus enabling them to engage targets without direct contact. Barometric fuzes are designed to activate at predetermined altitudes using atmospheric pressure changes, which is particularly useful for aerial bombs that should explode at a specific height.

Combustion, on the other hand, is not a recognized category of fuze. While combustion processes might play a role in certain types of explosives, they are not categorized as a type of fuze in military terminology. This distinction highlights the unique functions of recognized fuze types which focus primarily on physical interactions with targets or environmental conditions.