Part 2 - Departure Scenarios
Welcome to Part II of our multi-part series on the
SN3308 ColorMap HSI. In our last installment, we talked about using the
SN3308 during taxi. This time we’ll look at two typical departure
scenarios. As you will see, the SN3308 can show a lot more than the
compass heading and course deviation of a mechanical HSI.
For an IFR departure we'd set up the MAP to show
flight plan waypoints, nearby navaids and nearby airports. Bearing
Pointer 1 (the blue arrow) would be set to GPS1 so it always points
straight ahead to the next GPS waypoint, and Bearing Pointer 2 (the
green arrow) might be set to a nearby navaid. In this case we’ve set it
to the VOR at our departure airport, KTEB, Teterboro, NJ. The Bearing
Pointers are helpful in routine navigation but in an emergency after
takeoff we can really put them to work, as you will see.
Take a look at the actual screen shot at right.
We’ve departed KTEB to the west and shortly after departure we have an
emergency which demands an immediate landing. On the GPS we’ve selected
the nearest airport with an ILS, in this case the ILS 23 to KMMU,
Morristown, NJ. The SN3308 then displays a courseline from the present
position to the IAF (MOREE), the courseline to the airport and even the
missed-approach to CAT NDB. Which way to turn? Turn on to the courseline
to MOREE intersection, the IAF. When Bearing Pointer 1 is directly on
the lubber line you will be heading "direct-to" MOREE. And Bearing
Pointer 2 is still pointing to KTEB as a secondary option.
VFR Flight/San Antonio direct
Austin
|
NAV: GPS |
MAP: ON |
|
BRG1: GPS1 |
BRG2: OFF |
|
VUE: ARC |
RANGE: 75nm |
|
COURSE POINTER: OFF |
IFR Departure/Emergency ILS to KMMU Rwy 23
|
NAV: GPS |
MAP: ON |
|
BRG1: GPS1 |
BRG2: NAV1 |
|
VUE: 360 |
RANGE: 15nm |
|
COURSE
POINTER: OFF |
Let’s look at another flight scenario. This time
we've just departed VFR from runway 30R at KSAT, San Antonio, TX, on a
GPS flight plan direct to KAUS, Austin, TX. We've set the MAP to ARC
view to give us a forward display of the flight plan waypoints and
airspace boundaries. Again we have set Bearing Pointer 1 to GPS1 to
assist in turning on-course after departure regardless of the departure
runway.
Also notice the airspace depiction colors on the map.
The dotted green lines are the Class C airspace, yellow are the Alert
areas, and purple are the MOAs. As we get closer to KAUS the level of
detail of the airspace will automatically increase as we zoom in the map
range. Below 15nm range the destination airport icon will change from a
circle to the actual runways, including the runway numbers. And one
important difference between the SN3308 map and the map on the GPS
receiver is the instantaneous response to movements in the aircraft
heading – it turns as fast as the airplane with no redraw time.
Now that you’ve had a glimpse of the SN3308
capabilities in the departure phase, in Part III we’ll explore a couple
of enroute scenarios.
Next: Part 3: En Route Scenarios.
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