|watch your six
Etymology: Aircraft bearings for flight are referenced in 360 degrees, but the clock face is used as a reference from the cockpit. The 12 o'clock position lies directly in front of the aircraft and 6 o'clock lies directly behind it.
(military) watch your back
Supplemental Details:Sponsor an extended definition for watch your six for as little as $10 per month. Click here to contact us.