Like a needle-nosed hunter from the deep, the Navy's Sea-Dart, a revolutionary new seaplane built by Convair, emerges from San Diego Bay following a fast test run. The new craft requires no beaching gear, emerging from or taking to the water under its own power, supplied by two Westinghouse turbojet engines. The hydroskis, retractable after takeoff, operate on the same principle as water skis used by sports enthusiasts. September 10, 1953.