Wargame Sound Detection

Sound Detection

              Sound detection apparatus can detect aircraft one turn away and provide direction of approach.  They can be used to direct searchlights or anti-aircraft guns.  Troops can detect sounds of gunfire at 1250m.  Sounds of engines are detected at a range of 750m.  Troops are detected at a range of 10m.

Observers

Unaided sight and hearing observers detect low or medium level aircraft only.  They can only observe in clear weather, to detect aircraft.  It gives one turn of warning of their approach and requires one man looking in each direction.

Optics

Optics is telescopes, binoculars, and weapons sights.  Optics work when the weather is clear, and requires four stationary soldiers.  It gives one turn warning and direction of approaching planes and approximate number of planes.  Optics is used to detect planes at low to medium altitude.

One meter range finders are for direct fire weapons or scissors telescopes.  Three meter heavy range finders are for large vehicles, ship or emplacement mounted devices for heavy artillery.  They are used both for observation and range estimation. 

Sound Detection Gear

Only works if it is quiet, clear, sprinkling or foggy.  Gives two turns of warning, gives direction of approaching planes at low to high altitude.  Sound detection gear requires four soldiers per station and requires three stations to triangulate readings.

Radar

Early, World War Two

Tube powered early radar provides one turn of warning, in any weather, except snow, 1 unit with four crewmen.

Improved, Circa 1955

Transistors provide 2 turns warning, in any weather, requires one unit with four crewmen.

Modern, circa 1955

Integrated Circuits provide 3 turns of warning, in any weather, requires one unit with four crewmen. 

21^st Century, Circa 1990

Computer chips provide 4 turns of warning, and can even provide 1 turn of warning against stealth aircraft.  This radar requires one unit and two crewmen to function..