USS Surprise (PG-63), the fourth American naval ship of the name, was a Temptress-class patrol gunboat during World War II.

After World War II, she was sold as a merchant vessel and ended her life in the Chinese navy as Lin I. HMS Heliotrope was built by John Crown and Sons Ltd, Sunderland, England, as part of the 1939 building programme.

She was involved in four major convoy battles: In October 1940 Heliotrope was part of the escort for HX 79, which was attacked by a U-boat "wolfpack", losing 12 ships sunk.

After an overhaul, she proceeded south and for the remainder of 1942 escorted convoys in the Caribbean Sea, principally between Trinidad and Guantanamo Bay, Cuba.

In May 1944, she returned to the North Atlantic and, until after the end of World War II in Europe in May 1945, rotated between Newfoundland, Greenland, and Iceland convoy runs and weather patrol duty.