Question: In which strait did two cargo ships collide in an accident that postponed the election where Peter Francis Martin was elected by acclamation?

Context paragraphs:
J. F. Duthie &amp; Company: J. F. Duthie & Company was a small shipyard in Seattle, Washington.  It was organized in 1911 and expanded in World War I to build cargo ships for the United States Shipping Board () .  In 1928 its name was changed to Wallace Bridge Company.  Some 27 of the 37 ships built at J. F. Duthie were the ""West" boats," a series of steel-hulled cargo ships built for the on the West Coast of the United States as part of the World War I war effort.

Charleston-class amphibious cargo ship: The "Charleston"-class amphibious cargo ships were a class of amphibious cargo ships in service with the United States Navy.  These ships served in Amphibious Readiness Groups between 1968 and 1994.  The ships were the last amphibious cargo ships built for the U.S. Navy, their role having been taken over by amphibious transport docks.

SS Belgic (1873): SS "Belgic" was a steamship of the White Star Line.  She was launched on 14 January 1873 as hull number 81 at Harland and Wolff Shipyards, Belfast, and delivered to the owners on 29 March 1873.  She was one of two cargo ships initially built by Harland and Wolff for the Bibby Line, but bought on the stocks for use on the South American service, the other ship being "Belgic"' s sister, SS "Gaelic" .

Amphibious cargo ship: Amphibious cargo ships were U.S. Navy ships designed specifically to carry troops, heavy equipment and supplies in support of amphibious assaults, and to provide naval gunfire support during those assaults.  A total of 108 of these ships were built between 1943 and 1945—which worked out to an average of one ship every eight days.  Six additional AKAs, featuring new and improved designs, were built in later years.They were originally called Attack Cargo Ships and designated AKA.  In 1969, they were renamed as Amphibious Cargo Ships and redesignated LKA.

Peter Trent: Peter Francis Trent (born 5 January 1946) is an English-born Canadian businessman and politician.  He was mayor of Westmount, Quebec until his retirement in April, 2017.  He was first elected as councillor in 1983.  He served as mayor from 1992 to 2001, he left politics at that time due to the forced merger with the City of Montreal.  He again became Mayor of Westmount by acclamation on the November 1, 2009 municipal election.

Northwest Steel: Northwest Steel was a small shipyard in Portland, Oregon.  Little is known of its background or owners, but during World War I the yard built cargo ships for the United States Shipping Board () .  Some 37 of the 46 ships ship built at Northwest Steel were the "West" boats, a series of -gross register ton (GRT) steel-hulled cargo ships built for the on the West Coast of the United States as part of the World War I war effort.

Algol-class vehicle cargo ship: The "Algol"-class vehicle cargo ships, also known as Fast Sealift Ships (FSS) or SL-7s, are currently the fastest cargo ships in the world, capable of speeds in excess of 33 kn .  Originally built in 1972 and 1973 as high-speed container ships known as SL-7's for Sea-Land Services, Inc., the ships' high operating costs limited their profitability.  All eight ships were acquired by the US Navy in 1981 and 1982, with the last ship converted, recommissioned and delivered to Military Sealift Command in 1986.  The conversion entailed the installation of four cranes, addition of roll on/roll off capability and a redesign of the cargo hold to better facilitate storage of vehicles.  Due largely to their high cost of operation, all fast sealift ships are kept in Reduced Operating Status, but can be activated and ready to sail in 96 hours.  All ships are named after bright stars in the night sky.

Peter Francis Martin: Peter Francis Martin (January 13, 1856 – May 2, 1935) was a contractor and political figure in Nova Scotia, Canada.  He represented Halifax in the House of Commons of Canada from 1917 to 1921 as a Unionist Party member.  Martin was elected by acclamation in the Khaki Election of 1917; in Halifax, the election was postponed after the Halifax Explosion and Martin's Liberal opponent withdrew in a show of post-explosion unity.  Martin replaced Prime Minister Robert Borden, who had run (and won) in Kings County.  Martin sat for Halifax division in the Senate of Canada from 1921 to 1935 as a Conservative.

London Statesman: London Statesman has been the name of two cargo ships owned by London and Overseas Freighters:

Halifax Explosion: The Halifax Explosion was a maritime disaster in Halifax, Nova Scotia, Canada, on the morning of 6 December 1917.   , a French cargo ship laden with high explosives, collided with the Norwegian vessel  in the Narrows, a strait connecting the upper Halifax Harbour to Bedford Basin.  A fire on board the French ship ignited her cargo, causing a large explosion that devastated the Richmond district of Halifax.  Approximately 2,000 people were killed by blast, debris, fires and collapsed buildings, and an estimated 9,000 others were injured.  The blast was the largest man-made explosion prior to the development of nuclear weapons, releasing the equivalent energy of roughly 2.9 kilotons of TNT.

Supporting paragraphs: Peter Francis Martin Halifax Explosion
Answer: the Narrows