What is the purpose of an "ender" in mortar ammunition?

The purpose of an "ender" in mortar ammunition is to serve as a protective cap on the fuze to prevent accidental detonation. This component is critical for ensuring safety during transport and handling before the round is properly prepared for firing. The ender prevents exposure of the sensitive fuze components to environmental conditions, which could inadvertently trigger detonation. By safeguarding the fuze until it is ready to be activated, the ender plays an essential role in the overall safety of mortar operations.