Checkswrecks
Ungenear to broked stuff. LiB battery consulting
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Global Moderator
2011 Site Supporter
LOL Aviation Navigate Communicate pre- dates the innertoobs by at least 60 years and probably goes back to WW2. This photo is from around 1969 when my flight instructor kept beating it into me. Pretty sure it was in the basic private pilot handbook published by the FAA then before Jeppesen, King, or any of the other training courses began.

