Vietnam, day off, operations calls and asks if I could take one of our Hueys down to Can Tho to pick up some spare parts, being an hour hog why not.
Taxiing for departure at Can Tho to return home to Dong Tam see a King Air (U-21) taxiing as well, him going to Saigon.
Settled in the cruise at exactly 2,000 on a cloudless beautiful day the cockpit is briefly darkened as the King Air sails overhead with seemingly only the thickness of a layer of paint separation. Being pressurised I expected him to be much higher. Always wondered what saved us both, sloppy flying on his part
in not being at exactly 2,000, or inherent altimeter error. Tribulations of VFR in uncontrolled airspace.