Portable GPS Enabled OBS-3+ Measurement System
How the GPS stays up to date - Schaefer Flight
MSFS - Using OBS mode on the G1000. (AH QL 4) - YouTube
Using the Garmin 530 GPS in OBS Mode - Runup.ca
navigation - What are the differences between an OBS, a CDI, a Heading indicator, and an HSI? - Aviation Stack Exchange
The OBS button
New approach-capable GPS navigator in X-Plane 10.30 - X-Plane Developer
MSFS: Using OBS Mode on the G1000 - Microsoft Flight Simulator - YouTube
MSFS - GPS OBS, Waypoint Suspend button - YouTube
How to use the OBS Function in the Garmin 530 GPS in X Plane - YouTube
Night Flying Techniques
Garmin GI-106B | Flight Instrument & Indicator
Heading - Direct To - OBS - Magnetic vs True and Magvars - General Discussion - Microsoft Flight Simulator Forums
e-obs GPRS High-Res (42g+) — Vertebrate Systems, LLC
OBS – BruceAir, LLC
TRC500 GPS System – Simkits
The OBS button
The OBS button
How to make and use Virtual VORs - Helicopter Training Videos (HTV)
The OBS button
A Flight Instructor's Journal: When Is It Time to "un-SUSP"?
