| Ship | Country | Description | 
|---|
| AG-13 |  Imperial Russian Navy | The AG-class submarine sank accidentally. She was refloated, repaired, and returned to service as AG-16. | 
| Ariel |  United States | The schooner was wrecked off the Inubōsaki Lighthouse, Japan. | 
| Aurora |  United Kingdom | The ship was presumed to have been sunk by a mine with the loss of all hands in the second half of 1917. She was on a voyage from Sydney, New South Wales to Iquique, Chile. | 
| Belem |  United Kingdom | The ship sank near Bude, Cornwall. [1] | 
| Catherine |  United States | The steamer was reported lost at Ugashik, Territory of Alaska. [2] | 
| Dorade |  French Navy | The naval trawler was lost sometime in 1917. | 
| Harriet G |  United States | During a voyage from Puget Sound to Hawaii with a cargo of lumber, the 252-ton brig capsized in the Pacific Ocean off Cape Flattery, Washington. The halibut schooner Sumner (  United States) salvaged Harriett G, which was re-rigged as a three-masted schooner and placed back in service as Esther (  United States). [3]  [4]  [5]  [6] | 
| Key West |  United States | The vessel was lost in Unimak Pass in the Aleutian Islands near Scotch Cap on the southwest corner of Unimak Island. [7] | 
| Mary Sachs |  United States | The 30-ton, 60-foot (18.3 m) twin-screw schooner was wrecked on Banks Island near Cape Kellett off the coast of Canada′s Northwest Territories. [8] | 
| Orthes |  Norway | The barque was abandoned in the Atlantic Ocean. She subsequently foundered. [9] | 
| Prince John |  United States | The steamer was lost in Wrangell Narrows in the Alexander Archipelago in Southeast Alaska. [10] | 
| Reuben L. Richardson |  United States | The 92-net ton schooner was wrecked in Clarence Strait in the Alexander Archipelago in Southeast Alaska. [11] | 
| Spes & Fides |  Norway | The fishing steamer, a former whaler, suffered an engine malfunction and sank in a storm off Tromsø, Norway. There were no deaths in the shipwreck. The wreck was located by divers at a depth of 20 m (66 ft) in 2014, after a search initiated by Sandefjord Museum. [12] | 
| Spokane |  United States | The steamer became a total loss at Farallon Bay ( 55°11′40″N133°04′45″W / 55.19444°N 133.07917°W / 55.19444; -133.07917 (Barren Islands) ) off northeastern Dull Island in Southeast Alaska. [13] | 
| Taurus |  United Kingdom | World War I: The coaster struck a mine and sank in the North Sea east of the Shetland Islands with the loss of nine crew. This was either during July 1917 or  August 1917. [14] | 
| SM U-50 |  Imperial German Navy | World War I: The Type U 43 submarine is believed to have struck a mine and sank in the North Sea off Terschelling, Friesland, Netherlands on or after 31 August. |