▁( two ▁crash ed ▁in ▁South ▁Korea , ▁three ▁shot ▁down ▁over ▁China ) ▁were ▁lost ▁with ▁all ▁hands ▁on ▁board . ▁In ▁January ▁ 1 9 6 7 , ▁two ▁remaining ▁R B - 6 9 As ▁fle w ▁back ▁to ▁NAS ▁Al amed a , ▁California , ▁and ▁were ▁converted ▁back ▁to ▁regular ▁US ▁Navy ▁P 2 V - 7 / SP - 2 H ▁AS W ▁aircraft ▁configurations . ▁Most ▁of ▁the ▁ 3 4 th ▁Squadron ' s ▁Black ▁Op ▁miss ions ▁remain ▁class ified ▁by ▁the ▁C IA — though ▁a ▁C IA ▁internal ▁draft ▁history , ▁Low - Level ▁Techn ical ▁Re con na issance ▁over ▁Main land ▁China ▁( 1 9 5 5 – 6 6 ), ▁reference ▁CS HP - 2 . 3 4 8 , ▁written ▁in ▁ 1 9 7 2 ▁that ▁covers ▁C IA / RO C AF / T ai wan ▁ 3 4 th ▁Squadron ' s ▁Black ▁Op ▁miss ions ▁is ▁known ▁to ▁exist . ▁The ▁C IA ▁does ▁not ▁plan ▁to ▁dec lass ify ▁it ▁until ▁after ▁ 2 0 2 2 . ▁ ▁Vietnam ▁War ▁ ▁During ▁the ▁Vietnam ▁War , ▁the ▁Ne pt une ▁was ▁used ▁by ▁the ▁US ▁Navy ▁as ▁a ▁gun ship , ▁an ▁over land ▁reconna issance ▁and ▁sensor ▁deployment ▁aircraft , ▁and ▁in ▁its ▁traditional ▁role ▁as ▁a ▁mar itime ▁pat rol ▁aircraft . ▁The ▁Ne pt une ▁was ▁also ▁util ized ▁by ▁the ▁US ▁Army ' s ▁ 1 st ▁Radio