Thread: Seeking advice
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Old 02-24-2020, 04:42 AM
  #5  
somewhereupther
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Joined APC: Dec 2015
Position: B727 CA
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Originally Posted by CardboardCutout View Post
Not clear what "ad-hoc 121" is.
121 supplemental.

ad-hoc cargo is basically on-demand cargo


https://www.merriam-webster.com/dictionary/ad%20hoc
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