Both photos are from the Abel Collection
Above,, Boeing Vertol CH-46 Sea Knight helicopters from HMM-165 take of/from the Phu Bai Airstrip to relieve HMM-265 on board the USS Tripoli (LPH 10). HMM-165 became the SLF Bravo helicopter squadron. In bottom photo, a Sikorsky UH-34D Sea Horse/row HAtM-362, the Sl^F Alpha helicopter squadron on board the USS Princeton (LPH 5). lands Marines from BLT 2/4 in a LZ near Camp Carroll.