STEP 1
Setting Magnetic Variation into the instrument by aligning the reference mark on the underside of the instrument with the required point on the East or West Magnetic Variation scale.

STEP 2
Setting Wind Parameters by rotating the wind mark to the forecast direction on the outer (true) compass and, whilst restraining the wind speed tab, use the bearing arm to rotate the display window until the forecast wind speed clicks into view.

STEP 3
Align the Instrument with True North on the half-mill chart with the point of departure (whether the start of the flight or an en-route waypoint) centred in the middle aperture.

STEP 4
Locate the Destination or en-route waypoint within the target aperture by rotating and linearly adjusting the bearing arm, ensuring that the True protractor remains in place.

STEP 5
Read off the Track/Course indicated on the magnetic (yellow) compass against the To Target °M pointer

and
the ETA (minutes) and Distance (nautical miles) from the bearing arm window.

STEP 6
Align the Compensation reference mark within the display window to the visible opposing triangles' apexes (max. adjustment is 11.25°) by rotating the bearing arm.

STEP 7
Read Wind Corrections for heading (°M) and ETA (%) and apply them to the above figures as indicated by their related triangle (Open -add, Solid -subtract).

Note that where the wind is within ±10° of the flight track/course, the arithmetic application sign is determined by the direction from which the reference mark was aligned in step 6. In practice unless wind speed is above 25kts compensation for wind angles of less than 10° is marginal.

NB. Completion of Steps 1 & 2 above is an essential preparation for any use of the instrument.

Good airmanship requires accurate tracking of planned radials and flight times. Whether "beacon bashing" or navigating with GPS, an appreciation of the wind correction for both heading and ETA is essential. In each of the following applications, the completion of Steps 6 & 7 above conveniently provides the required information.

The centre aperture of QuDieM Navigator has been designed to match the VOR compass rose printed on half-mill charts to facilitate alignment with such beacons.

Tracking From a VOR
Align the instrument over the VOR as Step 3 above.
Having located the target aperture per Step 4, the Track/Course at Step 5 will provide the OBI radial FROM the VOR.

Tracking To a VOR
Position the instrument over your departure point per Step 3 above.
Having located the target aperture over the VOR, the Track/Course at Step 5 will provide the OBI radial TO the VOR.

NDB Radials
Where the point of departure and/or destination is an NDB, employing the instrument as for VFR navigation provides the NDB magnetic radial to be tracked at Step 5.

Holding Patterns
Set the °M From Target pointer against magnetic (yellow) compass reading representing the inbound holding heading. (There is no need to aliggn the instrument over the holding beacon). Complete Steps 6 & 7 to determine the basic wind correction angle.

1. Determined your magnetic bearing to a suitable beacon from the cockpit instrument.

2. Align the instrument over the beacon with the bearing arm at minimum distance and rotate the bearing arm to set the °M From Target pointer to this bearing on the magnetic (yellow) compass.

3. Insert a marker into the target aperture and, whilst preventing any rotation of the instrument, draw a line on the chart by extending the bearing arm using the marker.

4. Repeat the procedure with a suitable second beacon. The point of intersection of the lines will indicate your present position.

Aircraft equipped with DME can locate their position using a single beacon and twinned with DME by setting the bearing arm to the indicated distance from the beacon. Having aligned the instrument over the reference beacon as 1 above, the target aperture will indicate their present position.