A retractable tricycle landing gear would allow amphibious operation.

On the 28th, she began preparing for another amphibious operation.

The idea that land-based air support was necessary to successfully conduct an amphibious operation was traditional doctrine.

This was an amphibious operation using landing craft and helicopters to transport the soldiers.

The second aircraft was fitted with a retractable tailwheel landing gear for amphibious operation which was later retrofitted to the prototype.

This included one aircraft carrier, ten cruisers and five of six amphibious ships.

Marines, if not already engaged in landing exercises, were loaded on amphibious ships and ordered to sea.

He later served in amphibious ships at sea for five years.

It includes anything conducted by surface ships, amphibious ships, submarines, and seaborne aviation, as well as ancillary support, communications, training, and other fields; recent developments have included space-related operations.