What is an exact location at sea from which a fire support ship delivers fires?

The correct choice is 'Fire Support Station' because it specifically refers to a designated location at sea from which a fire support ship coordinates and delivers its fire support. This term highlights the strategic function of a fire support ship, indicating not just a location but a recognized point in the operational plan where munitions can be effectively launched in support of ground or naval operations.

In contrast, while a 'Phase Line' is a reference line that may indicate the progress or location of units in relation to their mission, it does not define a specific point for fire delivery. A 'Fire Support Area' generally encompasses a broader geographic zone where multiple fire support assets can be utilized, but it does not pinpoint an exact location. Lastly, a 'Boundary' defines the limits of areas of responsibility for operations, which again is more about demarcation and less about fire delivery. Therefore, 'Fire Support Station' directly addresses the precise location needed for the context of delivering fires from a fire support ship.