BendixKing SKYMAP IIIC - Manual (Page 93)

DETAILED OPERATION
To calculate Density Altitude (DALT) and True Airspeed (TAS) follow these steps.
1. Enter the indicated altitude reading from your altimeter next to the IALT heading.
Default value on entry to Screen is GPS altitude for Skymap IIIC or 2000 feet for
Tracker IIIC if no altitude value is being received from the position source.
7. Move the cursor over the entry field next to the heading IAS/CAS and enter your
indicated or calibrated airspeed. Default value on entry to this screen is GPS ground
speed.
8. Move the cursor over the entry field next to the heading BARO and enter the
atmospheric pressure in either inches of mercury (Hg) or millibars (mb). Default
value is 29.92Hg / 1013mb.
9. Move the cursor over the entry field next to the heading TAT and enter the total air
temperature read from your external aircraft thermometer in either F or C. Default value
on entry to this Screen is 59F/15C.
The calculated density altitude (DALT) and true airspeed (TAS) will now be correctly
displayed in the lower half of the Screen.
To calculate Winds Aloft (WIND) and Headwind / Tailwind Component (COMP), follow
these steps.
1. Ensure you have followed steps one to four above so that TAS has been correctly
calculated.
10. Move the cursor over the entry field next to the word HDG and enter the magnetic
heading of the aircraft from your compass or DI. Default value on entry to this
Screen is GPS track D
E
T
A
IL
E
D
O
P
E
R
A
T
IO
N
11. The wind direction and speed (WIND) along with the head or tailwind component
(COMP) will now be displayed in the lower half of the Screen.
When the wind has been calculated and you return to the map Screen by pressing Key 5,
MAP, a wind arrow will be displayed on screen, correctly orientated and pointing at the
aircraft icon to give a visual representation of the wind direction with respect to the aircraft.
The wind arrow will disappear after 30 seconds.
Vertical Navigation (VNAV)
VNAV is a function that tells the pilot when to start descending or climbing in order to
reach a certain altitude at a certain distance from the next waypoint and is entered by
pressing Key 3, VNAV, on Screen 57, E6-B Calculator Cover Screen.
This function can only be switched on when a Flight plan is being flown or a DIRECT TO is
being executed, in other words, when there is a valid destination waypoint.
Rev 8 Oct 2004 3-50 Skymap/Tracker IIIC Pilot's Guide