Should you ever fly into a discontinuity, this will be annunciated on the CNX80 and the
system will roll wings level and continue on the same course it had prior to reaching the
waypoint before the discontinuity.
Intercepting an Airway
There are a couple of ways this typically happens when you’re dealing with ATC (but of
course there are always the really creative controllers that have something unique in mind
for you,) usually a vector to intercept and occasionally the outbound radial to intercept an
airway.
Vectors onto an airway are simple to deal with using your autopilot, or merely flying the
heading assigned. By observing the CNX80 you can determine on the moving map
approximately where you will intercept the airway (between waypoints CARRO and
GLORR for example,) then simply select the Direct To page and scroll down to the next
waypoint, GLORR in this example, and press Flyleg. This activates that leg of the flight
plan for navigation and you will see that on the bottom of the page in magenta.
At this point, the CNX80 will provide navigation to the leg. By engaging the autopilot
(roll steering capable,) the CNX80 will drive you to the active leg and then sequence the
flight plan normally. For non roll steering capable autopilots, wait until the needle comes
alive and then engage the NAV mode, making sure you’ve set the course appropriately.
For radial to intercept an airway, this can be accomplished a couple of different ways,
depending upon what’s most convenient. You can set the frequency on the VHF Nav
radio using the NRST function and selecting VOR’s and using old fashioned VHF Nav
radio skills, or you can select the VOR if it’s in your flight plan or directly from the
database and use the OBS mode located on the Direct To page.
This reads your HSI or CDI resolver and allows you to use the GPS WAAS navigation
function to essentially treat any waypoint as a VOR station. The system automatically
goes into suspend mode and the outbound radial you’ve selected will be shown on the
moving map. As you reach the intercept of the airway, simple press the SUSPend key
and the CNX80 will capture the airway and fly onto it. This again is automatic if you
have roll steering capability. For non roll steering autopilots, wait until you are within
the turning radius of the autopilot, press the SUSPend key and select the new course.
Done in a timely fashion, you should not have to leave autopilot NAV mode.
