Which compatibility group includes ammunition and explosives containing HE without its own means of initiation?

The compatibility group that includes ammunition and explosives containing high explosives (HE) without their own means of initiation is Group E. This group is specifically designated for items that consist solely of high explosives that do not have built-in initiation capabilities, meaning they require an external source for detonation.

Group E materials are significant in shipboard explosive safety as they must be stored and handled with specific procedures to prevent accidental initiation, especially in environments like aircraft carriers where the risk of fire and explosion must be minimized. Items in this group are also classified separately to ensure that they are not stored in close proximity to materials that could potentially initiate them, thereby enhancing safety protocols.

This understanding is critical for personnel involved in handling, storing, and transporting munitions aboard aircraft carriers, as it underscores the importance of adhering to proper explosive handling practices.