The O'Brien class of destroyers was a class of six ships designed by and built for the United States Navy shortly before the United States entered World War I. The O'Brien class was the third of five classes of destroyers that were known as the "thousand tonners", because they were the first U.S. destroyers over 1,000 long tons (1,016 t) displacement.
USS McDougal was an O'Brien-class destroyer built for the United States Navy prior to the American entry into World War I. The ship was the second U.S. Navy vessel named in honor of David Stockton McDougal, a U.S. Navy officer notable for his leadership during an 1863 battle off Japan while in command of Wyoming.
HMY Iolaire was an iron-hulled steam yacht that was launched in Scotland in 1881 as Iolanthe. She was renamed Mione in 1898; Iolanthe in 1900; and Amalthæa in 1907. Between 1881 and 1915 a succession of industrialists and aristocrats had owned the yacht. She was commissioned into the Royal Navy in 1915 as HMY Amalthaea, and renamed HMY Iolaire in 1918. She was wrecked in a storm at the mouth of Stornoway harbour on New Year's Day 1919. The disaster killed more than 200 people, including many of the young men of the isles of Lewis and Harris. UK law now protects her wreck as a war grave.
P. Henderson & Company, also known as Paddy Henderson, was a ship owning and management company based in Glasgow, Scotland and operating to Burma and New Zealand. Patrick Henderson started business in Glasgow as a merchant at the age of 25 in 1834. He had three brothers. Two were merchants working for an agent in the Italian port of Leghorn; the third, George, was a sea captain with his own ship.
HMCS St Julien was one of twelve Battle-class naval trawlers constructed for and used by the Royal Canadian Navy (RCN) during the First World War. Following the war the ship was transferred to the Canadian Department of Marine and Fisheries and converted into a lightvessel. Re-designated Lightship No. 22, the ship remained as such until 1958. The ship was sold for commercial use and renamed Centennial and was in service until 1978.
HMCS Florence was a commissioned patrol vessel of the Royal Canadian Navy that served in the First World War. Originally launched as the yacht Czarina, she was acquired by John Craig Eaton in 1910 and renamed Florence. Following the outbreak of war, Eaton donated the yacht to the Royal Canadian Navy. The ship had a short career and proved unsuitable for navy work and was paid off in September 1916. The vessel was subsequently sold to buyers in Martinique, and was reportedly lost in the Caribbean Sea in January 1917.
HMCS Hochelaga was a steam yacht that was converted into a Royal Canadian Navy (RCN) patrol ship. She was built in Scotland, and launched in 1900 as Waturus for Archduke Charles Stephen of Austria. He sold her to a US buyer in 1902, who sold her to the Canadian Government in 1915. She was converted into an armed yacht, renamed Hochelaga, and patrolled the Atlantic coast of Canada. She was in naval service until 1920, when she was offered for sale. From 1923 to 1942 Hochelaga was a ferry linking Prince Edward Island and Nova Scotia. From 1943 to 1945 the United Fruit Company used her in the sugar trade with Puerto Rico. In 1946 she was renamed HaChayal Ha'Ivri, although officially she remained registered as Hochelaga. As HaChayal Ha'Ivri she tried to take Jewish emigrants from Belgium to Palestine, but was stopped by the Royal Navy. By 1951 she was registered under the Panamanian flag of convenience. Lloyd's Register still listed her in 1959.
HMCS Tuna was a steam yacht that was converted into a Royal Canadian Navy torpedo boat. She was the first turbine-powered steam yacht ever built. She was built in London, England in 1902 as Tarantula for Colonel Harry McCalmont. He died soon after she was completed, and in 1903 William Kissam Vanderbilt II acquired her. In 1914 JKL "Jack" Ross bought her and transferred her to the Minister of Naval Service for Canada, who had her converted into a torpedo boat. She served in the First World War until 1917, when she became irreparably unfit for service. She was sold for scrap in 1918, and her hulk survived in Halifax, Nova Scotia until the 1930s.
Cory is a recycling and waste management company based in London. Originally founded as William Cory & Son in 1896, the company has operated vessels on the River Thames for more than 125 years, transporting a range of commodities and materials including coal, oil, aggregates and waste. Ships from Cory's fleet supported Britain's war efforts in both world wars, with 30 ships being lost during the conflicts. From the 1980s onwards, the business has become increasingly focused on waste management.
USCGC Seneca, or before 1915 USRC Seneca, was a United States Coast Guard cutter built and commissioned as a "derelict destroyer" with the specific mission of locating and then destroying abandoned shipwrecks that were still afloat and were a menace to navigation. She was designed with excellent sea-keeping qualities, a long cruising range, good towing capabilities, and by necessity the capacity to store a large amount of munitions. She was one of five Coast Guard cutters serving with the U.S. Navy in European waters during World War I.
An armed yacht was a yacht that was armed with weapons and was typically in the service of a navy. The word "yacht" was originally applied to small, fast and agile naval vessels suited to piracy and to employment by navies and coast guards against smugglers and pirates. Vessels of this type were adapted to racing by wealthy owners. The origin of civilian yachts as naval vessels, with their speed and maneuverability, made them useful for adaptation to their original function as patrol vessels. In the United States Navy armed yachts were typically private yachts expropriated for government use in times of war. Armed yachts served as patrol vessels during the Spanish–American War and the World Wars. In the latter conflicts, armed yachts were used as patrol vessels, convoy escorts, and in anti-submarine duties. In the United States, yachts were purchased from their owners with the owners given an option to repurchase their yacht at the close of hostilities.
USLHT Azalea was built as a lighthouse tender and performed in that role on the Massachusetts coast from 1891 to 1917 and again from 1919 to 1933. During World War I, she served in the United States Navy as USS Azalea. Between the wars she was a commercial freighter in Chesapeake Bay, and later between Florida and The Bahamas. During World War II, she was reacquired by the U.S. Navy and served as USS Christiana, a seaplane tender which supported advanced bases in The Bahamas. Declared surplus in 1946, she was sold to Banana Supply Company, and spent a decade transporting bananas from the Caribbean to Miami. After 1956 her history is uncertain until she became a half-sunk derelict and was scrapped in Miami in 1965.
LV-117 was a lightvessel of the United States Lighthouse Service. Launched in 1931, she operated as the Nantucket lightship south of Nantucket Shoals. Moored south of Nantucket Island, Massachusetts, the lightship was at the western part of the transatlantic shipping lane and the first lightship encountered by westbound liners approaching New York Harbor. On May 15, 1934, one of these liners, RMS Olympic, rammed and sank LV-117, killing seven of her crew.
USRC Mohawk, was a steel steam powered revenue cutter built for the U.S. Revenue Cutter Service by William R. Trigg Company at Richmond, Virginia. Her primary duties in the Revenue Cutter Service and Coast Guard were assisting vessels in distress and enforcing navigational laws as well as a derelict destroyer. Mohawk was sunk after a collision with another vessel in October 1917.
USS Wakiva II (SP-160) was a steel-hulled steam yacht that was built in Scotland for Lamon V. Harkness in 1907, and converted into an armed yacht in 1917. She was a United States Navy convoy escort from Brest, France from October 1917. That November she attacked and almost certainly sank an enemy U-boat. She was sunk in May 1918 by a collision that killed two of her crew.
The third USS Wanderer (SP-132), was an armed yacht that served in the United States Navy from 1917 to 1919.
United States Navy operations during World War I began on April 6, 1917, after the formal declaration of war on the German Empire. The United States Navy focused on countering enemy U-boats in the Atlantic Ocean and the Mediterranean Sea while convoying men and supplies to France and Italy. Because of United States's late entry into the war, her capital ships never engaged the German fleet and few decisive submarine actions occurred.
The Caprice was a 19th-century Sandy Hook pilot boat built in 1871 by Brown & Lovell in East Boston, Massachusetts for Peter McEnany and other New York pilots. In 1876, she was run down and sank, off Bay Ridge, Brooklyn, by the steamship New Orleans. She was raised and was one of the pilot boats that survived the Great Blizzard of 1888. The Caprice was last reported sailing off the coast of New York in 1891.
The Sandy Hook was a steam pilot boat built in 1902, by Lewis Nixon at the Crescent Shipyard in Elizabeth, New Jersey. In 1914, she was purchased by the New York and New Jersey Sandy Hook Pilots Association to replace the pilot boat New Jersey, that was lost in 1914. She could carry 10 to 12 pilots that would help guide ships through the New York Harbor. The Norwegian America Line Oslofjord, with the Crown Prince Olav of Norway and Princess Märtha of Sweden on board, ran into and sank the Sandy Hook in 1939.
HMS Rosemary was an Arabis-class minesweeping sloop of the British Royal Navy. Built by the Teesside shipbuilder Richardson, Duck and Company from 1915–1916, Rosemary carried out minesweeping and anti submarine operations during the First World War. She was used for fishery protection duties during the 1930s, and served through the Second World War, finally being sold for scrap in 1947.
United Kingdom 
United Kingdom
