Busy day at the Camp San Luis Obispo parade ground, c. 1968. 3 of the 4 helicopters we operated are shown, the fourth was the OH-13.  We also had O-1's and U-6's, 

sometimes the U-1 and UH-1.  The CH-47 replaced the CH-37 in late 1971.  The YO-3A's were prepared for shipment to Viet Nam in our hangar at Stockton.
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