Characteristics for an American amphibious transport dock (LPD) in March 1961

Dimensions 510 x 84 x 18 feet. Speed 20 knots. Troop capacity 1,000. Cargo capacity 2,500 tons. Aircraft 6 H-37 or 12 H-34 helicopters(rotors folded). Well capacity 9-LCM6 or 1-LCU and 3-LCM6 or 4-LCM-8.

Source

Army forces in amphibious operations (the Army Landing Force). Department of the Army Field Manual FM 31-12. March 1961.