In combat, the mission of the 91st was general surveillance of the enemy rear areas by means of both visual and photographic reconnaissance.

Primarily it provided visual and photographic reconnaissance and airborne forward air control for fighter aircraft.

Nevertheless, the group took numerous aerial photographs of enemy territory, made daily visual reconnaissances and made several adjustments of artillery.

He was also celebrated for his feats of visual and photographic reconnaissance under hazardous circumstances.

In this incarnation, its principal mission was visual reconnaissance and forward air control of fighter-bombers, although it continued to train Vietnamese pilots and observers.

Its mission was primarily to keep the command informed by visual and photographic reconnaissance of the general situation within and behind enemy lines.

The 165th would perform day and night, high and low, and visual and photographic reconnaissance.

It also performed visual reconnaissance, convoy escort, and other missions as directed by the Tactical Air Commander.

The thick tree cover and camouflage undermined visual reconnaissance.

It ran check flights for newly assigned aircrews, as well as flew visual reconnaissance and forward air control missions under various call signs.