SYMBOLOGY Flashcards
Heading scale
Command Heading - The command heading chevron symbol along the bottom of the magnetic heading scale indicates the heading to the next navigation waypoint as selected from the Tactical Situation Display (TSD) page.
Alternate Sensor Bearing - The alternate crewmember sensor bearing is a filled chevron displayed at the bottom of the heading scale and indicates the opposite crewmember’ selected LOS with respect to the heading of the aircraft. This allows one crewmember to see the other crewmembers selected sensor LOS relative to the aircraft heading.
Automatic Direction Finding (ADF) Bearing Symbol - The ADF bearing is an “inverted lollipop” symbol presented along the bottom of the magnetic heading scale, represents the current bearing to the tuned Non-Directional Beacon (NDB).
Digital Rate of Descent - Both positive altitude (climb) and negative (descent) display on the FLT page. Only negative altitude displays on the HMD.
Altitude Hold - When the flight control system is attempting to hold altitude, a horizontal “home plate” symbol is placed at the zero rate of climb symbol position as the altitude hold symbol.
Skid/Slip Ball The skid/slip ball provides an indication of the amount of side acceleration and how well a turn is coordinated.
Field Of Regard (FOR) - A box representing the selected sensor, the FOR displays at the bottom and represents the total gimbal limits of the crewmember’s selected sensor.
FOV Box - The FOV box is a small, dynamic box displayed within the FOR. Represents the real time FOV relative position within the FOR, based on the crewmember’s selected sight and FOV.
Cued LOS Dot - The CUED LOS dot is a dynamic symbol displayed within the FOR. Represents the active acquisition source relative to the aircraft ADL. Edge limited within the FOR.
Attitude Hold - When the flight control system is attempting to hold attitude, the Attitude Hold symbol displays around the airspeed readout to indicate selection of attitude hold mode.
Engine Torque - Presented as a digital readout in the upper left area of the display. Indicates the highest engine torque of the two engines. When a greater than 12% (difference) torque split occurs between engines, the torque flashes to indicate impending single engine operation.
Engine Turbine Gas Temperature (TGT) - The engine TGT digital readout displays in the upper left area, below the torque indication. TGT only displays when two minutes remain in any particular TGT limit range (e.g., after TGT has been in the 30-minute range for 28 minutes). TGT displays for the entire two and a half minutes of single engine contingency power.
Force of Gravity (G) status - A digital indication of the experienced vertical acceleration will be displayed when aircraft is within 0.25 G’s of the current acceleration limit
Cueing dots - Cueing dots appear at all four tips of the LOS reticle and flash when the “IHADSS B/S REQUIRED” message is present within the High Action Displays Sight Status field. The cueing dots do not appear when the acquisition source is within 4º of the LOS. Front seat must select slave button on RHG to enable cueing
Head Tracker - The Head Tracker is a virtual broken diamond symbol displayed in the center area of the format. The Head Tracker is displayed when it moves within 30° vertically and 40° horizontally about the nose of the aircraft.
LOS reticle - The LOS reticle is a crosshair located in the center area of the flight format. It represents the LOS of the crewmember when the selected sight is HMD or TADS and is used as an aiming reticle. It is also used as a reference for the IHADSS boresight as well as for the head tracker, horizon line, velocity vector, acceleration cue, and the hover position box.
Cued LOS reticle - The Cued LOS reticle is a dashed crosshair symbol, which represents the crewmember’s active acquisition source. The Cued LOS reticle is only presented when the selected sight and acquisition are valid, and CUEING is selected on.
Flight Path Vector (FPV) - Provides the crewmember an indication of projected aircraft flight path, based on the current flight control settings and movement of the aircraft.
Navigation Fly-To Cue - The navigation fly-to cue represents direction to the active next navigation waypoint. It is used in conjunction with the flight path vector to aid in navigation. It is a small diamond shaped polygon with a flat bottom and a dot in the center, When properly aligned, the flight path vector will fit within the cue. When presented on the Flight (FLT) page, it is not virtual. The fly-to cue can be selected on or off via the TSD SHOW, HMD SHOW page.
Navigation Data - Destination point Indicates which waypoint, hazard, control measure, or threat/target is currently selected as the fly-to destination point. The destination point is displayed in the lower left area of the display.
Time to Go - Indicates how much time it will take to reach the fly-to destination point based on the aircraft’s current ground speed. Not displayed when the aircraft ground speed is at or below 15 knots or the estimated time is greater than or equal to 10 hours.
Acceleration cue - The acceleration cue provides magnitude and direction indication of the aircraft acceleration relative to the end of the velocity vector.
Acceleration cue - The acceleration cue provides magnitude and direction indication of the aircraft acceleration relative to the end of the velocity vector.
Velocity vector - The Velocity Vector symbol is used to indicate the magnitude and direction of the aircraft velocity relative to the nose of the aircraft. The velocity vector is a solid line displayed in the center of the format. The origin is the center of the LOS reticle. The line orients in the direction of the aircraft movement according to the direction and severity of motion acting on the aircraft at that instant.
