Liste des navires de l'United States Navy : N-O

United States Department of Defense Seal.svg
Sceau du Département de la Défense des États-Unis d'Amérique

Seal of the United States Department of the Navy.svg
*Description: On a circular background of fair sky and moderate sea with land in sinister base, a tri-mast square rigged ship under way before a fair breeze with after top-sail furled, commission pennant atop the foremast, National Ensign atop the main, and the commodore's flag atop the mizzen. In front of the ship 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, an American bald eagle rising to sinister regarding to dexter, one foot on the ground, the other resting on the anchor near the shank; all in proper colors. The whole within a blue annulet bearing the inscription "Department of the Navy" at the top and "United States of America" at the bottom, separated on each side by a mullet and within a rim in the form of a rope; inscription, rope, mullet, and edges of annulet all gold. *Background: The policy for use of the Navy seal and emblem is contained in SECNAV Instr 5030.4 and SECNAV Instr 5030.6. The seal design was approved by the President of the United States by Executive Order 10736 dated October 23, 1957. Request for use of the Navy emblem should be submitted in writing to Defense Printing Service, ATTN: DPSMO, 8725 John Kingman Rd Suite 3239, Fort Belvoir, VA 22060-6220. The telephone number is (703) 767-4218. 1879 version here: http://etc.usf.edu/clipart/54900/54985/54985_seal_navy.htm

Flag of the United States Navy (fringe).svg
The Flag of the United States Navy, as defined in s:Executive Order 10812 of April 24, 1959. The design is described there as:

The flag for the United States Navy is 4 feet 4 inches hoist by 5 feet 6 inches fly, of dark blue material, with yellow fringe, 2½ inches wide. In the center of the flag is a device 3 feet and 1 inch overall consisting of the inner pictorial portion of the seal of the Department of the Navy (with the exception that a continuation of the sea has been substituted for the land area), in its proper colors within a circular yellow rope edging, all 2 feet 6 inches in diameter above a yellow scroll inscribed "UNITED STATES NAVY" in dark blue letters.

The U.S. Navy flag is used for display purposes at ceremonies, parades, and other public functions where the U.S. Navy has an official presence, usually being carried by an honor guard on ceremonial occasions. It is not used for outdoor, fixed (permanent) purposes, and is not flown on Navy ships. Versions without fringe and different dimensions seem to be common, though it appears they are not technically the official U.S. Navy flag, as the executive order has not been amended.

Prior to 1959, the Navy Infantry Battalion flag was used to represent the U.S. Navy.

For more information, see the Navy's flag history page, SeaFlags, Flags of the World, U.S. Navy document NTP 13(B) [1], section 1710, and Navy regulation OPNAVINST 10520.1 (which replaced a similar SECNAVINST 10520.2D regulation from 1974).