USS Amber (PYc-6) was a patrol boat in the United States Navy during World War II, built at Long Beach, California in 1930 as the yacht Infanta for the actor John Barrymore.

Infanta was designed by Ted Geary and built by the Craig Shipbuilding in Long Beach, California for John Barrymore as a present to his wife, actress Dolores Costello.

Power was from two 275bhp Atlas-Imperial diesels driving twin propellers[1][3][4] The Barrymores used the yacht sparingly, due to his preference for the simpler pleasures of his sailboat and his increasing alcoholism.

[6] The yacht was subsequently renamed Polaris by owners Edward and Kathryn Lowe of San Francisco and home-ported at Juneau, Alaska.

[4] Amber was assigned to the Inshore Patrol of the 13th Naval District and, from May until early August, operated around Seattle, Tacoma, and Port Townsend, Washington.