USS Idalis (SP-270)

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Name: USS Idalis
Namesake: Previous name retained
Builder: Gas Engine and Power Company, Morris Heights, the Bronx, New York
Completed: 1908
Acquired: June 1917
Commissioned: 25 August 1917
Fate: Returned to owner 22 March 1919
Notes: Operated as civilian yacht Idalis and Amalia IV 1908-1917 and from 1919
General characteristics
Type: Patrol vessel and training ship
Tonnage: 40 tons
Length: 67 ft 8 in (20.62 m)
Beam: 14 ft 2 in (4.32 m)
Draft: 3 ft (0.91 m)
Speed: 10 knots
Armament: 1 x 1-pounder gun

USS Idalis (SP-270) was a United States Navy patrol vessel in commission from 1917 to 1919.

Idalis was built as a civilian motor yacht in 1908 by the Gas Engine and Power Company at Morris Heights in the Bronx, New York. Sources differ as to her original name; she either was built as Idalis and later was renamed Amalia IV,[1] or was built as Amalia IV and later renamed Idalis.[2] The U.S. Navy purchased her from her owner, Carl Reinschild of New York City, in June 1917 for World War I service. She was commissioned on 25 August 1917 as USS Idalis (SP-270) -- that name representing the Navy either retaining her existing name[3] or reverting her from Amalia IV to her previous name[4] -- with Lieutenant G. C. Fry, USNRF, in command

Assigned to the 3rd Naval District, Idalis served as a patrol craft in Long Island Sound and as training ship for officers at the Naval Reserve Training School Pelham Bay Park at Pelham Bay Park, New York, until the close of World War I.

Idalis was returned to Reinschild on 22 March 1919.


  1. Per the Dictionary of American Naval Fighting Ships (at
  2. Per NavSource Online (at
  3. Per NavSource Online (at
  4. Per the Dictionary of American Naval Fighting Ships (at