bendwise

The first official Navy seal, adopted in 1870, showed a ship under sail with the motto "Sustentans et Sustentatum," Latin for "sustaining and having sustained." Since the 1950s, when Eisenhower signed legislation changing a few military insignia, the Navy seal features a three-masted, square-rigged ship with the commodore's flag "atop the mizzen," a "Luce-type anchor inclined slightly bendwise with the crown resting on the land and, in front of the shank and in back of the dexter fluke." And a rope and an eagle.

The technical description of the arms is "Azure a Feather bendwise Argent quilled between two Bendlets Or all between two like Feathers Argent quilled Or".