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Situation 1: Precision ILS DME approach runway 01 - select situation TromsoUW11AirBaltic
This
situation places you flying north up the Norwegian coast at FL180, on a winter's
afternoon. You have a light fuel load and are readying the aircraft for descent.
The active Nav1 frequency is tuned to the Skagen (SKG) VOR on 112.8, the reserve
to the Andoya (AND) VOR on 112.2 and the ADF is tuned to the Kobbe (KBV) NDB
near Tromso. Your flight plan takes you via SKG on your current heading, then
to AND on a heading of 028, from where you will alter course to 073 degrees
(075 if you are using the Jeppesen plate) and fly the transition to KBV. You
have planned to begin your descent about 9 miles from SKG. You have an altitude
of 18000 set on the Mode Control Panel (MCP) and ALT and HDG modes should be
selected - if they aren't select them now. Cruise in to SKG, and when the DME
reaches about 3.5 nm, alter course to 028, tune Nav1 to AND (112.2) and twist
the OBS to 028 as well.
If you select the ADF on the RMI, the needle should spring to life about 17 nm from AND, alerting you to the imminent descent. Check that the reserve frequency on Nav1 is set to the ILS on 110.9. At 9 miles on the DME, reset the altitude to 15000, take the aircraft out of CRZ on the engine management system, press ASEL on the MCP and set the vertical speed to 1500 feet per minute - the aircraft should now begin a descent. Theoretically you should do this using the IAS mode of the MCP, but I have found that this isn't completely reliable, partly because the settings on the FS2000 autopilot can differ from those on the F50 autopilot. You can check this by going to \aircraft\autopilot on the main FS2000 menu and making sure that neither ASH or MNH are checked, which is usually the problem. As a rather more reliable alternative to the IAS mode, you can use ASEL and VS and manage the throttles yourself.
You
should reach AND at 15000, and when the DME reads about 3.5, begin a turn onto
073. Swap frequencies on Nav1 so that the active frequency is tuned to the ILS
on the reserve frequency (110.9) and the OBS is set to 010, which is the front
course for the ILS. Tune Nav2 to the TRO VOR on 113.8 and press the Nav2 selector
on the MCP so that the EADI shows Nav2 data. Then press both the ADF and the
Nav2 selectors on the RMI.
Now watch the ADF needle so you can bracket your course for wind drift. Reset your altitude on the MCP to 5500, engage IAS (or VS) and ASEL mode again, and begin your descent. Mouse the knob on Espen Oijordsbakken's Nav radio to the "RAD" setting so that you can identify the 205 radial from TRO which marks the mid-point of the DME arc. Now watch the DME - when it reaches 19 you must prepare to fly the arc.
If
you have flown the
DME arc tutorial, you will
have a pretty good idea what to do, but this is an arc with a difference, because
it is effectively only has two segments: from our current location on the 220
radial to 205, and another from 205 to 194, which takes you onto the ILS. So
fly on until the DME reads 17.5 nm, then turn onto 115 degrees and watch the
Nav radio until the radial annunciated below it reads 205. The DME shouldn't
drop below 16.5 nm at any time; if it looks like it is going to, alter your
heading to compensate.
As you cross the 205 radial, swap the active radio frequency from Nav2 to Nav1 so that the ILS is tuned and turn the aircraft heading onto 040, which should give an easy intercept on the localiser. Incidentally, the plate is slightly misleading here - it looks like you have plenty of time to make the turn after you intercept the 205 radial, but in practice if you don't begin the turn almost immediately you will fly right through the localiser. As soon as you are established on 040 arm the GS mode on the panel and wait for the plane to fly onto the beam. Once you are established on the localiser, disengage ALT, drop the gear and flaps and ride on down to the MDA. At the MDA remember to disconnect the autopilot and you can fly right her in like a professional.
Andrew HerdRead the tutorial on basic instrument approaches.
