USS Shark (SP-534)

	USS Shark while hauled out of the water sometime between 1917 and 1919.
History
United States
Name	USS Shark
Namesake	The shark (previous name retained)
Completed	1909
Acquired	17 May 1917
Commissioned	24 May 1917
Stricken	16 September 1919
Fate	Sold 20 October 1919
Notes	Operated as civilian motorboat Ildico IV and Shark 1909-1917
General characteristics
Type	Patrol vessel
Tonnage	30 tons
Length	74 ft 4 in (22.66 m)
Beam	12 ft 5 in (3.78 m)
Draft	4 ft 2 in (1.27 m)
Speed	12 knots
Complement	12
Armament	1 × 1-pounder gun; 1 × machine gun;

The fourth USS Shark (SP-534) was a United States Navy patrol vessel in commission from 1917 to 1919.

Shark was built as the civilian motorboat Ildico IV^[2] in 1909 at South Yarmouth, Massachusetts. She later was renamed Shark. The U.S. Navy purchased Shark from her owner, Louis Herzog of New York City, on 17 May 1917 for World War I service as a patrol vessel. She was commissioned on 24 May 1917 as USS Shark (SP-534).

Assigned to section patrol duty in the 1st Naval District in northern New England, Shark conducted harbor patrols there for the rest of World War I and for a few months after the end of the war.

Shark was stricken from the Navy List on 16 September 1919 and sold to Morgan Barnes on 20 October 1919.

Notes

^ The Dictionary of Naval Fighting Ships' online reference to her as Ildeo IV appears to be an optical scanner error induced during conversion of the hard-copy version of the document into an electronic format.
^ The Dictionary of Naval Fighting Ships' online reference to her as Ildeo IV appears to be an optical scanner error induced during conversion of the hard-copy version of the document into an electronic format.