Wargame Rules Sentry Alertness and Radar

Sentry Alertness

            At night one sentry is on duty for every platoon sector in military zones.  Essentially, one man out of every fifty will be on guard duty.  In addition, every headquarters, company level and above, will have a CQ duty staff, with one additional sentry, per command level.  The command staff will be a sergeant of the guard at company level, an officer of the guard at battalion level.  A company will have one sentry, a battalion will have two, and a brigade will have three sentries.  Sensitive areas, nuclear or chemical, may have additional sentries.

            In garrison, units have sentries out from 2000 hrs, until 0600 hrs.  Between the hours of 0700 and 1900 hrs, there are sentries only at headquarters and sensitive areas.  In war zones, sentries are out only from 2200 hrs, to 0400 hrs.  After that, or when on alert, normal conditions apply.  One sentry may be stationed in each platoon area between dusk to dawn, to watch for intruders.  Sentry alertness, roll D%5 die per number then modify that number based on the morale of the sentry.  Infiltrators skill rolls D%5 per number then modify that number based on the morale of the infiltrators.

SENTRY & INFILTRATOR

Sentry

Alertness          each point         +5%

Alarmed                                    +35%

With a dog                                +35%

Within 1250m                            +35%

Infiltrator

Skill                  each point         -5%

Stationary                                 -35%

Out of line of sight                    -35%

Noise muffled by waves                        -35%

Radar Detection

            Mountains and hills, above three tiers, will block radar detection.  Aircraft flying low level or below are not detected by radar.  Modern radar may be mounted on AWACS aircraft and will then "look down" to detect down to ground level.  Stealth technology aircraft cannot be detected by modern radar.

AIRCRAFT DETECTION

Detection Method         Turns Warning             Information Provided

Unaided sight/hearing    One                              Enemy approaching

Sound detection gear    One                              Direction of approach

Early radar                    One                              Direction & quantity

Improved radar              Two                              Direction, quantity

Modern radar                Three                            Direction, quantity, altitude

Sonar Detection

            Underwater craft may be detected by sonar.  Sonar can be inside the hull of a surface craft, or may be a buoy.  Sonar may also be dipped by aircraft, or emplaced on the sea floor.

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..