Which of the following reports is used to communicate the position of a unit?

The term that signifies the report used to communicate the position of a unit is specifically the POSREP. This report focuses on providing detailed and precise information regarding a unit's current location, operational status, and any pertinent details that may be necessary for coordination and planning purposes.

By utilizing the POSREP, commanders and operations staff ensure that all relevant units are informed of the position of troops, which is crucial for situational awareness and effective command and control in tactical operations. This facilitates better resource allocation, strategic planning, and interaction with other units or operational branches.

Other report types, while potentially useful in their own contexts, either do not specifically address unit position or serve different functions in operational communication. For instance, a SITREP usually reports on the overall situation and status of operations but does not focus solely on positions. Meanwhile, Spotrep is a report related to specific sightings or observations and does not directly convey unit positions. Ehspotrep is a less common term that may refer to specific electronic or enhanced reports but is not predominantly used to denote unit positioning.