Part 5 - The ILS Approach
Welcome to Part-V of our series on the SN3308
ColorMap HSI. In previous installments we’ve shown that you can
customize your map and airspace settings to meet your needs during the
departure and enroute phases of your flight. This time we’ll examine a
typical ILS scenario to show how valuable the SN3308 can be during an
approach.
In this scenario we’re inbound on the ILS 35R
approach to Centennial Airport (KAPA) in Denver, CO. From the northeast,
the approach begins with a transition from the Falcon VOR to CASSE LOM,
which is also the IAF. From CASSE the route takes us through the
procedure turn. Once you’ve selected and activated the approach on your
GPS, the SN3308 immediately draws that approach in full color. The
SN3308 can also use additional information from the newest generation of
GPS receivers (such as the Garmin GNS 430™ ) to display holding
patterns, procedure turns and DME arcs. Your entire navigation situation
is now right in your scan. By combining the functions of a moving map
and HSI on one display, the SN3308 hugely simplifies complex approaches.
In the screen shot at right we’ve already
completed the procedure turn and are now on final for runway 35R. The
active leg of the approach is shown in magenta with the other legs shown
in white. We’ve also activated the two bearing pointers of the SN3308 to
provide additional navigation information. Bearing Pointer 1 (cyan) is
set to the GPS receiver and is pointing to the active waypoint, RW35R.
Bearing Pointer 2 (magenta) is coupled to the ADF receiver tuned to
CASSE, which we have just passed and is now behind us.
ILS Rwy 35R approach to KAPA,
Denver Centennial Airport
|
NAV: NAV1 |
MAP: OFF |
|
BRG1: GPS1 |
BRG2: ADF1 |
|
VUE: 360 |
RANGE: N/A |
|
COURSE POINTER: ON |
ILS Rwy 35R approach to KAPA,
Denver Centennial Airport
|
NAV: GPS1 |
MAP: ON |
|
BRG1: GPS1 |
BRG2: ADF1 |
|
VUE: 360 |
RANGE: 10nm |
|
COURSE
POINTER: AUTO |
In the screen shot at left we’re on final, 1.8 miles
from KAPA. The SN3308 has automatically switched to ILS mode as we’ve
tuned in the ILS frequency and are receiving a valid glideslope signal.
We’ve turned off the map, but of course you can choose to leave the map
information on the display if you like. We’re a half-dot high on the ILS
and lined up with the runway. Bearing Pointer 1 points straight ahead,
pointing to the ILS. Bearing Pointer 2 is still pointing to CASSE which
is behind us. On this approach, CASSE is also the first fix on the
Missed Approach Procedure, so if we miss, the bearing pointer is already
set to take us there.
Notice that the course pointer and deviation bars
have switched from cyan to green as the primary nav source for the
SN3308 has switched from the GPS to the ILS. This color-coding makes the
information easy to interpret no matter how complex a display you choose
to show.
The SN3308 is a true EFIS for general
aviation. It’s a direct replacement for your current HSI, but offers
much more information than standard mechanical instruments. In this
series we’ve tried to demonstrate that whether you’re flying a cabin
class twin in the flight levels or a single in severe clear, the big
leap in capabilities of the SN3308 will reduce your workload and make
your flight safer and more enjoyable.
Garmin and GNS 430 are trademarks of
Garmin Corporation
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