Which force is specifically trained in the use of deadly force?

The option identifying Navy personnel on security duty as specifically trained in the use of deadly force is correct. This is because members of the Navy's security forces, particularly those serving in Master-at-Arms roles, undergo extensive training that includes the appropriate use of deadly force as part of their duties to protect people and property. Their training is regimented and governed by military regulations, ensuring they understand the legal and operational implications of using such force.

This training encompasses not only the physical and tactical aspects of using weapons but also the decision-making process involved in assessing threats and determining the appropriate response. The training prepares them to handle real-life situations where the use of deadly force may be justified under specific circumstances, such as when lives are in imminent danger.

In contrast, civilians hired for security purposes, military police from allied forces, and local experts in emergency response may have varying levels of training and authority regarding the use of deadly force, often guided by different legal standards or organizational policies. While they may receive some level of security training, it may not be as comprehensive in scope regarding military use of force protocols as that provided to Navy personnel specifically in security duty roles.