The U.S. Navy attempted to launch a reassembled German V-2 rocket at sea. One test launch from the aircraft carrier USS Midway was performed on September 6, 1947 as part of the Navy's Operation Sandy. The test launch was a partial success; the V-2 went off the pad, but splashed down in the ocean only some 10 km (6.2 mi) from the carrier. Film of V-2 launch from USS Midway The launch setup on the Midway's carrier deck is notable in that it used foldaway arms to prevent the missile from falling down. The arms pulled away just after the engine ignited, releasing the missile. The setup may look similar to the R-7 launch procedure, but in the case of the R-7 the trusses hold the full weight of the rocket, not just react to side forces.