Question: What type of vessel does USCGC Woodrush and SS Edmund Fitzgeraldhave in common?

Context articles: USCGC Maple (WLB-207)
Oglebay Norton Corporation
Steamship
SS Atlantic (1953)
Ernest M. McSorley
USCGC Woodrush (WLB-407)
SS Edmund Fitzgerald
USS Mayflower (1897)
Jim Bajor
SS Arthur M. Anderson

USCGC "Maple" (WLB-207) is a 225-foot United States Coast Guard seagoing buoy tender.
 "Maple" is the seventh of 16 in the "Juniper" class and took the place of the decommissioned USCGC "Woodrush" .
The Oglebay Norton Corporation operated ships on the Great Lakes.
 At one point their flagship was the SS Edmund Fitzgerald through their Columbia Transportation Division.
A steamship, often referred to as a steamer, is a vessel, typically ocean-faring and seaworthy, that is propelled by one or more steam engines that typically drive (turn) propellers or paddlewheels.
 The first steamships came into practical usage during the early 1800s; however, there were exceptions that came before.
 Steamships usually use the prefix designations of "PS" for "paddle steamer" or "SS" for "screw steamer" (using a propeller or screw).
 As paddle steamers became less common, "SS" is assumed by many to stand for "steam ship".
 Ships powered by internal combustion engines use a prefix such as "MV" for "motor vessel", so it is not correct to use "SS" for most modern vessels.
SS "Atlantic" was an American-built vessel that operated for 42 years in various capacities.
 First designated SS "Badger Mariner", she was originally built as a freighter in 1953.
 However, her career as a cargo vessel was relatively short.
 In 1958, she was rebuilt as a passenger liner.
 Renamed SS "Atlantic", this ship became familiar to many American tourists during the 1960s, making cruises to the Caribbean and Mediterranean.
 After she was retired from commercial service, she had a lengthy career as a university at sea, first as the SS "Universe Campus", then as the SS "Universe".
Ernest Michael McSorley (September 29, 1912 – November 10, 1975) was the last captain of the ill-fated Laker-type freighter "SS Edmund Fitzgerald".
 McSorley died along with the other 28 members of his crew when the "Fitzgerald" sank in Lake Superior on November 10, 1975.
USCGC "Woodrush" (WLB-407) was a buoy tender that performed general aids-to-navigation (ATON), search and rescue (SAR), and icebreaking duties for the United States Coast Guard (USCG) from 1944 to 2001 from home ports of Duluth, Minnesota and Sitka, Alaska.
 She responded from Duluth at full speed through a gale and high seas to the scene of the SS "Edmund Fitzgerald" sinking in 1975.
 In 1980, she took part in a rescue rated in the top 10 USCG rescues when she helped to save the passengers and crew of the cruise ship "Prinsendam" after it caught fire in position 57°38"N 140° 25"W then while being towed sank off Graham Island, British Columbia.
 She was one of the first vessels to respond to the "Exxon Valdez" oil spill in 1989.
 She was decommissioned on 2 March 2001 and sold to the Republic of Ghana to serve in the Ghana Navy.
SS "Edmund Fitzgerald" was an American Great Lakes freighter that sank in a Lake Superior storm on November 10, 1975, with the loss of the entire crew of 29.
 When launched on June 7, 1958, she was the largest ship on North America's Great Lakes, and she remains the largest to have sunk there.
The second USS "Suwannee and third USS "Mayflower was a United States Lighthouse Board, and later United States Lighthouse Service, lighthouse tender loaned to the United States Navy in 1898 for service as an auxiliary cruiser during the Spanish–American War and from 1917 to 1919 for service as a patrol vessel during World War I.
 She also served the Lighthouse Board and in the Lighthouse Service as USLHT "Mayflower" from 1897 to 1898, from 1898 to 1917, and from 1919 to 1939, and in the United States Coast Guard as the first USCGC "Mayflower" (WAGL-236) in 1939 and from 1940 to 1943 and as USCGC "Hydrangea" (WAGL-236) from 1943 to 1945.
Jim Bajor (1953 – 21 December 2006) was a new-age music pianist with some jazz influences.
 His self-released debut album "Awakening" received a Grammy nomination.
 In 1995 he performed on the 'Somewhere In Time' album, a cover version of Erroll Garner's 1954 Jazz standard Misty (song).
 He also worked with PBS on a special about the sinking of the SS Edmund Fitzgerald.
SS "Arthur M. Anderson" is a cargo ship of the laker type.
 It is famous for being the last ship to be in contact with  before "Edmund Fitzgerald" sank on 10 November 1975.
 "Arthur M Anderson" was also the first rescue ship on the scene in a vain search for "Edmund Fitzgerald" survivors (there were none).
 The vessel's namesake, Arthur Marvin Anderson, was director of U.S. Steel at the time.