HMCS Thiepval

The North Sea lies between Great Britain, Denmark, Norway, Germany, the Netherlands, Belgium and France. An epeiric sea on the European continental shelf, it connects to the Atlantic Ocean through the English Channel in the south and the Norwegian Sea in the north. It is more than 970 kilometres (600 mi) long and 580 kilometres (360 mi) wide, covering 570,000 square kilometres (220,000 sq mi).

The beam of a ship is its width at its widest point. The maximum beam (BMAX) is the distance between planes passing through the outer extremities of the ship, beam of the hull (BH) only includes permanently fixed parts of the hull, and beam at waterline (BWL) is the maximum width where the hull intersects the surface of the water.

The draft or draught of a ship's hull is the vertical distance between the waterline and the bottom of the hull (keel). The draught of the vessel is the maximum depth of any part of the vessel, including appendages such as rudders, propellers and drop keels if deployed. Draft determines the minimum depth of water a ship or boat can safely navigate. The related term air draft is the maximum height of any part of the vessel above the water.

The knot is a unit of speed equal to one nautical mile per hour, exactly 1.852 km/h. The ISO standard symbol for the knot is kn. The same symbol is preferred by the Institute of Electrical and Electronics Engineers (IEEE), while kt is also common, especially in aviation, where it is the form recommended by the International Civil Aviation Organization (ICAO). The knot is a non-SI unit. The knot is used in meteorology, and in maritime and air navigation. A vessel travelling at 1 knot along a meridian travels approximately one minute of geographic latitude in one hour.

The Royal Navy (RN) is the United Kingdom's naval warfare force. Although warships were used by English and Scottish kings from the early medieval period, the first major maritime engagements were fought in the Hundred Years' War against France. The modern Royal Navy traces its origins to the early 16th century; the oldest of the UK's armed services, it is consequently known as the Senior Service.

The Castle-class minesweeper was a highly seaworthy naval trawler adapted for patrol, anti-submarine warfare and minesweeping duties and built to Admiralty specifications. Altogether 197 were built in the United Kingdom between 1916 and 1919, with others built in Canada, India and later New Zealand. Many saw service in the Second World War.

The QF 12-pounder 12-cwt gun (Quick-Firing) was a common, versatile 3-inch (76.2 mm) calibre naval gun introduced in 1894 and used until the middle of the 20th century. It was produced by Armstrong Whitworth, Elswick and used on Royal Navy warships, exported to allied countries, and used for land service. In British service "12-pounder" was the rounded value of the projectile weight, and "12 cwt (hundredweight)" was the weight of the barrel and breech, to differentiate it from other "12-pounder" guns.

A depth charge is an anti-submarine warfare (ASW) weapon. It is intended to destroy a submarine by being dropped into the water nearby and detonating, subjecting the target to a powerful and destructive hydraulic shock. Most depth charges use high explosive charges and a fuze set to detonate the charge, typically at a specific depth. Depth charges can be dropped by ships, patrol aircraft, and helicopters.

The Great Lakes, also called the Great Lakes of North America, are a series of large interconnected freshwater lakes in the mid-east region of North America that connect to the Atlantic Ocean via the Saint Lawrence River. There are five lakes, which are Superior, Michigan, Huron, Erie, and Ontario and are in general on or near the Canada–United States border. Hydrologically, lakes Michigan and Huron are a single body joined at the Straits of Mackinac. The Great Lakes Waterway enables modern travel and shipping by water among the lakes.

The Battle of Thiepval Ridge was the first large offensive of the Reserve Army, during the Battle of the Somme on the Western Front during the First World War. The attack was intended to benefit from the Fourth Army attack in the Battle of Morval, by starting 24 hours afterwards. The battle was fought on a front from Courcelette in the east, near the Albert–Bapaume road, to Thiepval and the Schwaben Redoubt in the west, which overlooked the German defences further north in the Ancre valley, the rising ground towards Beaumont-Hamel and Serre beyond.

Kingston is a city in Ontario, Canada. It is located on the north-eastern end of Lake Ontario, at the beginning of the St. Lawrence River and at the mouth of the Cataraqui River. The city is midway between Toronto, Ontario and Montreal, Quebec. Kingston is also located nearby the Thousand Islands, a tourist region to the east, and the Prince Edward County tourist region to the west. Kingston is nicknamed the "Limestone City" because of the many heritage buildings constructed using local limestone.

HMCS Armentières was one of twelve Battle-class naval trawlers used by the Royal Canadian Navy (RCN). Armentières entered service in 1918 near the end of the First World War on the Atlantic coast of Canada. Following the war, the ship was transferred to the Department of Marine and Fisheries for a short period before reverting to RCN service in 1923 on the Pacific coast of Canada. The ship sank in 1925, was raised and re-entered service, remaining with the fleet through the Second World War as an examination vessel at Prince Rupert, British Columbia. After the end of the war, the vessel entered mercantile service becoming A.G. Garrish in 1947, later renamed Arctic Rover in 1958, Laforce in 1962 and Polaris in 1973. The ship's registry was deleted in 1991.

HMCS Givenchy was one of twelve Battle-class naval trawlers constructed for and used by the Royal Canadian Navy (RCN) during the First World War on the east coast. Following the war, the ship was transferred to the Department of Marine and Fisheries for use as a fisheries patrol vessel on the west coast. Givenchy reentered service with the RCN in 1939 as an accommodation ship during the Second World War and was recommissioned from 1940 to 1943. After the war the ship was sold and broken up in the United States in 1952.

HMCS Stadacona was a commissioned patrol boat of the Royal Canadian Navy (RCN) that served in the First World War and postwar until 1920. Prior to entering service with the RCN, the vessel was the private yacht Columbia. Following the war, Stadacona performed hydrographic surveys. The vessel was sold for commercial use in 1920 and was burned for salvage in 1948. Stadacona is a historic name associated with Canada, the voyages Jacques Cartier, the colony of Samuel de Champlain, and Quebec City.

The Panama Canal is an artificial 82 km (51 mi) waterway in Panama that connects the Atlantic Ocean with the Pacific Ocean and divides North and South America. The canal cuts across the Isthmus of Panama and is a conduit for maritime trade. One of the largest and most difficult engineering projects ever undertaken, the Panama Canal shortcut greatly reduces the time for ships to travel between the Atlantic and Pacific oceans, enabling them to avoid the lengthy, hazardous Cape Horn route around the southernmost tip of South America via the Drake Passage or Strait of Magellan and the even less popular route through the Arctic Archipelago and the Bering Strait.

The Graveyard of the Pacific is a somewhat loosely defined stretch of the Pacific Northwest coast stretching from around Tillamook Bay on the Oregon Coast northward past the treacherous Columbia Bar and Juan de Fuca Strait, up the rocky western coast of Vancouver Island to Cape Scott.

The North Pacific Fur Seal Convention of 1911, formally known as the Convention between the United States and Other Powers Providing for the Preservation and Protection of Fur Seals, was a treaty signed on July 7, 1911, designed to manage the commercial harvest of fur-bearing mammals in the Pribilof Islands of the Bering Sea. The treaty, signed by the United States, Great Britain, Japan, and Russia, outlawed open-water seal hunting and acknowledged the United States' jurisdiction in managing the on-shore hunting of seals for commercial purposes. It was the first international treaty to address wildlife preservation issues.

Alaska is a U.S. state on the northwest extremity of North America. A semi-exclave of the U.S., it borders British Columbia and the Yukon in Canada to the east, and it shares a western maritime border in the Bering Strait with the Russian Federation's Chukotka Autonomous Okrug. To the north are the Chukchi and Beaufort Seas of the Arctic Ocean, and the Pacific Ocean lies to the south and southwest.

Bella Bella, also known as Waglisla, is the home of the Heiltsuk and is an unincorporated community and Indian reserve community located within Bella Bella Indian Reserve No. 1 on the east coast of Campbell Island in the Central Coast region of British Columbia, Canada. Bella Bella is located 98 nautical miles (181 km) north of Port Hardy, on Vancouver Island, and 78 nautical miles (144 km) west of Bella Coola. The community is on Lama Passage, part of the Inside Passage – a transportation route linking the area, and northern British Columbia as well as Alaska for marine vessels carrying cargo, passengers and recreational boaters from the south coast. The settlement "forms a national capital of sorts" to the Heiltsuk.

The Aleutian Islands, also called the Aleut Islands or Aleutic Islands and known before 1867 as the Catherine Archipelago, are a chain of 14 large volcanic islands and 55 smaller islands. Most of the Aleutian Islands belong to the U.S. state of Alaska, but some belong to the Russian federal subject of Kamchatka Krai. They form part of the Aleutian Arc in the Northern Pacific Ocean, occupying a land area of 6,821 sq mi (17,666 km2) and extending about 1,200 mi (1,900 km) westward from the Alaska Peninsula toward the Kamchatka Peninsula in Russia, and act as a border between the Bering Sea to the north and the Pacific Ocean to the south. Crossing longitude 180°, at which point east and west longitude end, the archipelago contains both the westernmost part of the United States by longitude and the easternmost by longitude. The westernmost U.S. island in real terms, however, is Attu Island, west of which runs the International Date Line. While nearly all the archipelago is part of Alaska and is usually considered as being in the "Alaskan Bush", at the extreme western end, the small, geologically related Commander Islands belong to Russia.

The Kamchatka Peninsula is a 1,250-kilometre-long (777 mi) peninsula in the Russian Far East, with an area of about 270,000 km2 (104,248 sq mi). The Pacific Ocean and the Sea of Okhotsk make up the peninsula's eastern and western coastlines, respectively. Immediately offshore along the Pacific coast of the peninsula runs the 10,500-metre-deep (34,449 ft) Kuril–Kamchatka Trench.

Hakodate is a city and port located in Oshima Subprefecture, Hokkaido, Japan. It is the capital city of Oshima Subprefecture. As of July 31, 2011, the city has an estimated population of 279,851 with 143,221 households, and a population density of 412.83 persons per km2. The total area is 677.77 square kilometres (261.69 sq mi). The city is the third biggest in Hokkaido after Sapporo and Asahikawa.