OBS mode
Obstacle departure procedures (ODP)
Obstruction lights
Onboard lightning detection systems
Onboard weather radar
Outer marker ...
---OBS is for the missed, procedure turns and holding
GPS starts in LEG mode such as 'direct to'
IFR GPS allows sequencing of waypoints as required for IFR procedures ...
Set your OBS to radial 103, which you'll intercept and track to SFO (airport code, obviously, for San Francisco International).
This will set you up to execute a nice professional final approach.
Tune the OBS to center the needle and ensure that you have a "To" reading. Look at your heading on the directional gyro (DG). Hold the heading as steady as you can.
per unit, the potential for low-speed up and down datalinks, and "selective interrogation" triggered by ground facilities NDB Non-Directional Beacon - an older type of electronic navigation aid, basically a low-power AM radio station OBS Omnibearing ...
This is easy: rotate the radial dial with the OBS knob until the pointer is centered and the flag says TO. Easy huh? The top radial says the direction to fly TO the station and the bottom (reciprocal radial) indicates the radial you are on.
The place where that line crosses your course-line is your present position. Another option is to pre-tune the OBS to the radial that corresponds to a point of interest ... when the needle centers, you're there.
 See also: Flight plan, Direct, Cross, Global Positioning System, Positioning
|
