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Plotting board
Videos
A plotting board was a mechanical device used by the U.S. Army Coast Artillery Corps as part of their fire control system to track the observed course of a target, project its future position, and der
Photo of plotting board table top
Photo of plotting board table top
Relation between plotting board and the actual geography of the harbor
Relation between plotting board and the actual geography of the harbor
Plotting room, with Whistler-Hearn board
Plotting room, with Whistler-Hearn board
A series of observed positions (blue circles) established the likely track of the target. Using the plotting board, the set forward point was determin
A series of observed positions (blue circles) established the likely track of the target. Using the plotting board, the set forward point was determined, based upon the target's observed course and speed and an assumption about when the gun was to be fired.
Plotting room
Videos
A plotting room was the co-ordination centre of a fire control system for guns used against enemy ships or aircraft, whether naval guns or coastal artillery. The plotting room received data on ship or
Plotting board
…that had been telephoned in from the base end stations into firing data for the guns. The plotting board for a given gun battery was located in the plotting room for that battery (shown at right, bottom), a space often attached to an observation post or protected within a reinforced concrete bunker or casemate…
Cut-away view of a Royal Navy World War II K-class destroyer Director Control Tower (D.C.T.) with Type 285 radar; plotting room shown on lower level
Cut-away view of a Royal Navy World War II K-class destroyer Director Control Tower (D.C.T.) with Type 285 radar; plotting room shown on lower level
This massive concrete casemate housed the underground plotting room for the 12-inch mortars of Battery Whitman at Fort Andrews in Boston Harbor.
This massive concrete casemate housed the underground plotting room for the 12-inch mortars of Battery Whitman at Fort Andrews in Boston Harbor.
1904 fire control station, east side of Fort Andrews, Massachusetts
1904 fire control station, east side of Fort Andrews, Massachusetts