<p>The two main electronic displays, labelled Radar and Weapons above, can each be in one of four modes. The modes can be selected by pressing the keys '[' and ']' for left and right respectively. This causes the displays to be toggled from one display to the next. The four modes are:</p>
<ul>
<li> Radar<br>
<li> Weapon<br>
<li> Navigation<br>
<li> Situation<br>
</ul>
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<h4>Radar display</h4>
<p>The radar display shows radar signals in the cone of view of the radar, which is about 45 degrees around the nose of your aircraft. As in real life some signals are due to your radar reflecting from air targets and some are due to enemy airfields and SAM sites illuminating your aircraft. The radar can distinguish between different signals and displays an appropriate symbol to indicate what it has detected:</p>
<ul>
<li> Green squares - enemy fighters<br>
<li> Yellow squares - enemy cargo planes<br>
<li> Red crosses - are SAM sites<br>
<li> Yellow crosses - enemy airfields<br>
<li> Blue crosses - captured airfields<br>
</ul>
<p>The radar display shows the positions and ranges of targets relative to your position and heading. There is no height information. The maximum range (in Km) can be varied using the V key. This toggles the range from 30 to 15 to 8 and back to 30. Targets that are too close are not displayed so you should use the 8 Km range for dogfights.</p>
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<h4>Weapons Display</h4>
<p>The weapons display shows which weapon is currently selected by changing its colour to red. The display is a plan view of the aircraft indicating that you have a single central cannon, 2 wing mounted rocket launchers and four wing mounted sidewinders. When sidewinders are selected the next missile to be launched is shown in red and the symbol vanishes when it is fired. The number at the top left indicates the number of cannon rounds remaining, to the nearest ten. So 25 is equivalent to 250 shells. The lower left number shows the number of chaff left and the lower right number is the number of flares left.</p>
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<h4>Nav Display</h4>
<p>The navigation display shows the range (in Km) and the compass bearing to the four waypoints, which are set on the map page. The currently selected waypoint is displayed in yellow. If the HUD is on, the bearing to the currently selected waypoint is displayed as a yellow line in the heading tape (see HUD section).</p>
<p>The LOCSAC is a computer generated display combining information from radar, infra red, and low bandwidth camera sources. The on board computer uses data from these detectors to put together a picture of the surrounding airspace (for a range of 5Km). The LOCSAC display presents this information to you as a heading up plan view. The interdictor is shown as a green aircraft symbol in the centre of the display. Enemy aircraft being tracked are shown as a short coloured line with a white dot behind it. The direction of the line shows the relative heading of the enemy. The position on the display represents the relative position of the enemy. The white dot shows the last recorded position of the enemy and the direction of the coloured line indicates the heading of the enemy relative to you. The colour of the line indicates the height of the enemy aircraft relative to you.</p>
<ul>
<li> Blue = enemy aircraft is more than 100M above interdictor.<br>
<li> Red = enemy aircraft is within 100M of interdictor altitude.<br>
<li> Green = enemy aircraft is more than 100M below interdictor.<br>
</ul>
<p>The display above shows three enemy aircraft within 5Km of the interdictor:</p>
<p>The blue line (1) shows an aircraft above you about 3Km in front and to your right travelling towards you.</p>
<p>The red line (2) shows an aircraft about the same altitude as you, 2Km to your right and travelling away from you.</p>
<p>The green line (3) shows an aircraft below you about 3Km behind you and travelling away from you.</p>
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<h4>Head up Display</h4>
<p>The head up display has been made simple to avoid obscuring the outside world. The most important features are the lines. These are called pitch bars and stay parallel with the ground at all times. You can therefore use them to recover from unusual attitudes and to keep you wings level when the horizon is not visible. The lines are at 10 degree intervals with a cross at 90 degrees. When you see the cross you are either heading straight up or straight down.</p>
<p>The number at the top left, ASI, is airspeed in knots. The number at the top right, ALT, is altitude in feet.</p>
<p>The heading tape, hdgtape, shows compass bearing. The BUG is an indicator of the heading to the currently selected waypoint. When it is central you are on target.</p>
<p>The small symbol in the middle, the LFD or Level Right Display, is where the centre of the fuselage is pointing. This can be used to aim the cannon and rockets.</p>
<p>The bottom left number is the Angle of Attack, AOA and the right number is the throttle setting.</p>
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<h4>Warning and Status Displays</h4>
<p>The most important warning display is the radar warning receiver (RWR). This is situated just above the compass. The RWR shows the relative bearing of an enemy radar signal. A green line indicates an enemy aircraft and a red line indicates a SAM. The lines only appear when an enemy radar is pointing at you. The lack of a line does not mean there is nothing close, merely that nothing is heading towards you. However an enemy has to point towards you in order to attack so you will get some warning from the RWR.</p>
<p>The three indicators at the top left of the instrument panel are for the weapons. These are, from left to right, rockets, sidewinders and cannon. A green lamp indicates the currently selected weapon and the number is the number of that weapon left.</p>
<p>The three green and yellow squares at the top centre of the instrument panel have red warning lamps which illuminate when they are active.</p>
<p>There are five indicator and warning lamps in the top right comer of the instrument panel. The upper half of each is an indicator:</p>
<ol>
<li> Green - Autostab engaged.<br>
<li> Green - Airbrakes on.<br>
<li> Not used<br>
<li> Orange - Stall warning; the aircraft angle of attack is too high, the nose must be lowered to regain normal flight.<br>
<li> Low fuel warning; you should land to refuel.
</ol>
<p>The lower halves are red warning lamps, numbered from left to right:</p>
<ol>
<li> Radar failure.<br>
<li> HUD failure.<br>
<li> Navigation system failure.<br>
<li> Hydraulic system failure; your landing gear and airbrakes are stuck in their current position and your wheel brakes will no longer work. You should attempt a landing for repairs.<br>
<li> Engine failure; your engine has been damaged, it produces only low power. You can reduce power by switching off the engine. You should land for repairs.
<p>At the bottom left of the instrument panel a group of three lamps indicates the landing gear state. The upper, red, lamps indicate gear up and the lower, green, ones indicate gear down.</p>
<p>The top number is the number of flares left, with a firing indicator which flashes when you have fired a flare. You start with 60 flares and use four each time that you fire flares.</p>
<p>The next number down is the number of chaff left, with a firing indicator which flashes when you have fired some chaff. You start with 40 chaff and two are used each time.</p>
<p>Below the compass is a sideslip indicator. Sideslip is when the aircraft is skidding sideways in the air. The indicator is useful for performing coordinated turns using the rudder to reduce the effects of sideslip. If the indicator reads to the left, you are slipping left and should bank less or use left rudder to coordinate the turn. The same applies for banking right with the indicator reading to the right. You will often be sideslipping when you are turning steeply and should be careful when flying low.</p>
<p>The large ball in the centre of the instrument panel is an attitude indicator. This shows your roll and pitch relative to the horizon. The blue half is up and green is down. The attitude ball is useful when your head up display has failed,</p>
<p><font size="+1"><strong>Elevator & Aileron position indicators</strong> </font></p>
<p>To the left of the attitude ball is the elevator position indicator and above it is the aileron position indicator. These are both setup to show the slightest control input so that you can centre the mouse precisely. The pointer triangle goes red when the control position is off the display range.</p>
<p>Below the attitude ball are two dials. The left dial is your altitude. The number in the middle is height in thousands of feet and the needle indicates from 0 to 1000 feet. This means thai 2300 feet is shown as 02 on the digits with the needle at the third white mark reading clockwise from the top.</p>
<p>The right dial is airspeed in knots. Zero is at the 12 o'clock position with each white mark being 100 knots. These last two instruments are essential when your head up display has failed. </p>
<p>To the right of the attitude ball is a vertical speed indicator. This shows your rate of climb or descent. The top half of the gauge shows green when climbing and the bottom half shows red when descending. This gauge is especially useful when turning steeply near the ground. If it shows descent you should pull up.</p>
<p><font size="+1"><strong>G Force meter</strong> </font></p>
<p>To the right of the right electronic display is a thermometer type gauge. This indicates the inertial force you are experiencing due to manoeuvring. The units are in gravitational force, g for short, where one is normal gravity. The gauge moves up for positive g and down for negative g.</p>
<p>The rightmost dials are from top to bottom:</p>
<p><font size="+1"><strong>Exhaust gas temperature</strong> </font></p>
<p>This indicates that your jet engine is working correctly.</p>
<p>Full is at the twelve o'clock position. The needle rotates anti-clockwise as fuel is used. The rate of fuel consumption depends on engine RPM. You also have the low fuel warning indicator described earlier.</p>
<p>This shows the engine revolutions per minute which indicates the engine power. This is controlled by the left and middle mouse buttons. When the needle is straight up the engine is off.</p>
<p>The most useful sound is the missile approach warning. This duplicates the warning light on the instrument panel. It sounds when a missile exhaust has been detected and therefore works for heat-seeking air-to-air missiles which give no radar signal. When you hear the warning you should take evasive action, and drop some flares.</p>
<p>When a sidewinder is your selected weapon the heat seeking head on a missile is activated. If it locks onto a target it causes the sidewinder lock sound. You can not launch a sidewinder before you hear the noise. The signal is accompanied by a warning indicator on the instrument panel.</p>
