How is a registration typically initiated?

A registration is a formal process that allows for the effective engagement of enemy targets and the establishment of control over fire support. It determines the best method for targeting and ensuring accuracy in fire missions. Typically, this process is initiated with a specific communication that clearly states the intent to register a target.

The option that states "H18 this is H44, registration, over," is correct because it explicitly indicates that the unit (H44) is informing the observer (H18) that they are initiating a registration. This direct communication establishes the necessary context for both parties to proceed with the registration procedures, ensuring clarity regarding the purpose of the transmission and the actions to be taken.

Other messages, such as a message to observer or an adjust fire command, do not accurately convey the initiation of a registration. While these options may pertain to other aspects of fire support operations, they lack the specificity needed to indicate that a registration process is beginning. A courtesy call, though a polite initial contact, also fails to provide the substantive intent of establishing a registration, which is critical in the context of fire support coordination.