Coast Artillery fire control system

In this plotting room, the table is a Whistler-Hearn plotting board. A range correction board is on the left rear of the table.
A conceptual diagram of the flow of fire control data in the Coast Artillery (in 1940). The set forward point of the target was generated by using the plotting board (1). This position was then corrected for factors affecting range and azimuth (2). Finally, fire was adjusted for observations of the actual fall of the shells (3), and new firing data were sent to the guns.

In the U.S. Army Coast Artillery Corps,[note 1] the term fire control system was used to refer to the personnel, facilities, technology and procedures that were used to observe designated targets, estimate their positions, calculate firing data for guns directed to hit those targets, and assess the effectiveness of such fire, making corrections where necessary.[1]


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  1. ^ "FM 4-15, Seacoast Artillery fire control and position finding". Archived from the original on 2019-05-02. Retrieved 2019-05-02.