BendixKing SKYMAP IIIC - Manual (Page 85)

DETAILED OPERATION
Arrival at an En-route User Waypoint
Screen 48: NAV Information and WPT ALERT Flags Showing – En-route Screen
To set the radius for the Arrival Alarm you should refer to the data on Screen 23, NAV
Mode Customisation Screen. When the distance remaining to run to an en-route waypoint
falls below the Arrival Alarm value, the [WPT ALERT] flag is displayed and the internal and
external alarms (if switched on) beep at a rate of 2Hz for 5 seconds. To make the change
to NEXT LEG you have to press Key 1 and if you wish to silence the alarm before the 5
seconds are up, simply press Key 5, the label of which has changed to ALARM OFF. The
alarm is switched off automatically after 5 seconds; Key 5 will go blank and have no
function for 2 seconds. It will then revert to DIRECT TO. This is a safety measure to
prevent you from inadvertently selecting DIRECT TO mode by pressing Key 5 just as it is
cancelling automatically.
DETAILE
D
OPE
RATION
Once you have pressed Key 1 to select the next leg, Screen 47 re-appears showing all the
relevant information for the new leg. The next leg of the flight plan will now be displayed as
a solid magenta coloured line with a black border. This black border differentiates the track
line from controlled airspace which has no border.
If you pass the waypoint the flag will change to [WPT PASSED]. If the unit has been set
up for AUTO NEXT LEG in Screen 23, then as the waypoint is passed the unit will
automatically revert to Screen 47 with all the new leg information. Key 1 will go blank and
inactive for two seconds. It will then revert to MAIN MENU.
When the WPT Alert alarm has been given, a new box will appear at the bottom of the
screen showing the new course [NEW CRS XXX] to steer for the next leg of the flight plan.
The next leg of the flight plan will also be displayed as a solid white line.
Prior to reaching a waypoint within a flight plan, Turn Anticipation provides navigation
along a curved path segment to ensure a smooth transition between two adjacent legs in
the flight plan. The curved path segment is based upon the aircraft's groundspeed and the
amount of course angle change between the legs.
Turn Anticipation will only work if it is selected ON in Screen 23, NAV Mode Customisation
Screen, and if the course change is greater than 5° and less than 90°. If the course
change is less than 5° then turn anticipation is not necessary. If the course change is
greater than 90° it is up to the pilot which way round the turning point he turns.
Rev 9 Oct 2006 3-42 Skymap/Tracker IIIC Pilot's Guide