Grenades, sounding devices, and similar items having explosive trains with less than two effective protective features fall under which compatibility group?

The classification of grenades, sounding devices, and similar items that feature explosive trains with less than two effective protective features falls under Group F. This compatibility group is specifically designated for items that possess certain characteristics that may make them less sensitive to accidental ignition or detonation when stored onboard, but they do not meet the thresholds required for higher safety classifications.

Group F encompasses explosives that have a moderate level of safety and stability, suitable for situations where their handling and storage must be carefully managed due to their inherent risks. When assessing compatibility groups, it is critical to understand the implications of the number of protective features an item possesses, as they directly influence storage requirements and safety protocols on shipboard.

In contrast, the other groups focus on different safety characteristics or functionalities of the explosives or munitions, emphasizing other factors like sensitivity, energy output, or intended use. Thus, recognizing the attributes assigned to Group F clarifies why this classification is appropriate for these types of explosive items.