Bay-class tugboat
{{Short description|US Coast Guard icebreaking tugboat class}}
{{about|a class of icebreaking tugboats in the United States Coast Guard|radio station WTGB|WTGB}}
| {{Infobox ship begin |sclass=2}}
{{Infobox ship image |Ship image=Coast Guard cutter Thunder Bay.JPG |Ship caption=The U.S. Coast Guard Cutter Thunder Bay clears a channel for vessels to navigate the frozen Hudson River }} {{Infobox ship class overview |Name=Bay class |Builders=Tacoma Boatbuilding Company, Tacoma, Washington and Bay City Marine Incorporated, National City, California |Operators=United States Coast Guard |Class before= WYTM-110 |Class after= |Subclasses= |Cost= |Built range=1977-1987 |In service range= |In commission range=1979-present |Total ships building= |Total ships planned=10 |Total ships completed=9 |Total ships active=9 |Total ships laid up= |Total ships lost= |Total ships retired= |Total ships preserved= }} {{Infobox ship characteristics |Ship type=Icebreaking tugboat |Ship displacement=662 tons |Ship length={{convert|42.7|m|ft|abbr=on}} |Ship beam={{convert|11.4|m|ftin|abbr=on}} |Ship draught={{convert|3.8|m|ftin|abbr=on}} |Ship ice class= |Ship propulsion= diesel electric: 2 Fairbanks Morse diesel engines with Westinghouse DC generators, 1 Westinghouse DC motor |Ship speed={{convert|14.7|kn|km/h}} |Ship range=*{{convert|1500|nmi|km}} at {{convert|14.7|kn|km/h}}
|Ship endurance= |Ship complement=17 (3 officers) |Ship sensors= |Ship EW= |Ship armament=2 × M240 machine guns |Ship armor= |Ship notes= }} |
The Bay-class tugboat is a class of {{convert|140|ft|m|adj=on}} icebreaking tugboats of the United States Coast Guard, with hull numbers WTGB-101 through to WTGB-109.
They can proceed through fresh water ice up to {{convert|20|in|cm}} thick, and break ice up to {{convert|3|ft|m}} thick, through ramming. They can also ram pressure ridges of up to eight feet in thickness. These vessels are equipped with a system to lubricate their progress through the ice, by bubbling air through the hull.
Service Life Extension Program (SLEP)
A SLEP is a major overhaul intended to extend a vessel's service life; it is typically scheduled as the vessel approaches the end of its originally planned service life. The Bay-class tugboat SLEP project includes significant system upgrades and improvements to the propulsion plant; to the heating, ventilation, and air conditioning systems; installation of an engine-room fire-suppression system; boat launching davit replacement; Oily Water Separator replacement; stack exhaust configuration modifications; hull air-ice lubrication system; and crew habitability improvements to meet current standards (including removal of lead paint). When the Coast Guard described the Bay-class tugboat SLEP to the U.S. Congress in 2015, the first SLEP was scheduled to take 12 months; however, the Coast Guard anticipated that after the third SLEP the Coast Guard Yard would have enough familiarity with the process to complete two SLEPs per year, with an anticipated duration of 9 months each. The first of nine cutters (Morro Bay) entered SLEP at the Coast Guard Yard on July 1, 2014.https://www.dhs.gov/sites/default/files/publications/OCFO/United%20States%20Coast%20Guard%20(USCG)%20-%20Coast%20Guard%20Yard%20Dry-dock%20Facilities%20and%20Industrial%20Equipment.pdf. {{Webarchive|url=https://web.archive.org/web/20161117033231/https://www.dhs.gov/sites/default/files/publications/OCFO/United%20States%20Coast%20Guard%20%28USCG%29%20-%20Coast%20Guard%20Yard%20Dry-dock%20Facilities%20and%20Industrial%20Equipment.pdf |date=2016-11-17 }} Morro Bay returned to her homeport of Cleveland in September 2015 http://www.uscgnews.com/go/doc/4007/2605666/Coast-Guard-Cutter-Morro-Bay-returns-to-Cleveland-following-14-month-overhaul{{Dead link|date=June 2019 |bot=InternetArchiveBot |fix-attempted=yes }}
File:ADM-Stosz001.jpg George Herbert Walker Bush tours {{USCGC|Katmai Bay|WTGB-101|6}} with the commanding officer, Coast Guard Lieutenant (now Vice Admiral) Sandra L. Stosz in 1990]]
Ships
- (WTGB-101) Katmai Bay (Homeport - Sault Ste. Marie, MI / Builder: Tacoma Boatbuilding Company)
- (WTGB-102) Bristol Bay (Homeport - Detroit, MI / Builder: Tacoma Boatbuilding Company)
- (WTGB-103) Mobile Bay (Homeport - Sturgeon Bay, WI / Builder: Tacoma Boatbuilding Company)
- (WTGB-104) Biscayne Bay (Homeport - St. Ignace, MI / Builder: Tacoma Boatbuilding Company)
- (WTGB-105) Neah Bay (Homeport - Cleveland, OH / Builder: Tacoma Boatbuilding Company)
- (WTGB-106) Morro Bay (Homeport - Cleveland, OH / Builder: Tacoma Boatbuilding Company]
- (WTGB-107) Penobscot Bay (Homeport - Bayonne, NJ / Builder: Bay City Marine Incorporated)
- (WTGB-108) Thunder Bay (Homeport - Rockland, ME / Builder: Bay City Marine Incorporated)
- (WTGB-109) Sturgeon Bay (Homeport - Bayonne, NJ / Builder: Bay City Marine Incorporated)
- (WTGB-110) Curtis Bay (Construction cancelled)
See also
- Bay-class lifeboat - three vessels with the Canadian Coast Guard
- Samuel Risley-class icebreaker and buoy tender with the Canadian Coast Guard
References
{{Reflist}}
External links
{{commons category|Katmai Bay class icebreaking tug}}
- [http://www.uscg.mil/datasheet/140wtgb.asp USCG page]
- [http://www.uscg.mil/reserve/magazine/mag1997/aug1997/wtgb.htm USCG Magazine article]
- [https://web.archive.org/web/20050123105928/http://www.wellandcanal.ca/shiparc/uscg/biscaynebay/bay.htm Welland canal page]
{{Bay-class tug}}
{{DEFAULTSORT:Bay-class icebreaking tug}}