The In-Service Vessel Sustainment Program is part of the Coast Guard’s long-term recapitalization and sustainment strategy for the in-service fleet of cutters.
The ISVS Program consists of two kinds of projects:
- Major maintenance availability (MMA) – Planned life cycle events for targeted work and recapitalization of obsolescent/unsupportable systems, necessary for the cutter to achieve its design service life. MMAs facilitate fleet maintenance and increased availability for missions during a cutter’s later years of service. Shifts in the cutter’s homeport and assigned crew are considered in the planning process.
- Service life extension program (SLEP) – Addresses specific systems and major maintenance to extend the service life of the vessel beyond the original design service life. A SLEP is not designed to increase a ship’s capability; it only extends the service life of the cutter by replacing obsolete, unsupportable or maintenance-intensive equipment and by seeking standardization of configuration issues.
Current ISVS projects:
- Service life extension program for the 140-foot Bay-class icebreaking tugs to restore mission readiness and extend the service life of this nine-cutter fleet by approximately 15 years. The fleet was commissioned between 1978 and 1988, with most hulls operating beyond their planned 30-year service life. Critical reliability and supportability issues have severely degraded the fleet’s mission readiness. Completed efforts include repair of corroded and damaged hull plating, structural refurbishment and replacement of unsupportable or maintenance-intensive equipment. The program is currently continuing with HVAC improvements.
- Service life extension program for Coast Guard Cutter Polar Star to recapitalize a number of major systems and extend the service life of the cutter until the second polar security cutter is operational. The SLEP will occur in a five-year phased production between 2021 and 2025. Polar Star is a 399-foot cutter, the service’s only active heavy polar icebreaker, which was commissioned in 1977. Phases 1-4 are complete.
- Major maintenance availability for 225-foot Juniper-class seagoing buoy tenders to ensure the 16 vessels in the class achieve the full 30-year designed service life. Work includes completion of hull and structural repairs and replacement of obsolete, unsupportable or maintenance-intensive equipment, including updates to the machinery control system, propellers and HVAC systems. The project started in July 2015. Twelve hulls are complete.
- Service life extension program for the 270-foot medium endurance cutters involves targeted system replacement to address system reliability, supportability, obsolescence and interoperability. This work will include upgrades or replacements to the electrical power generation and distribution system as well as the main propulsion engines. The mission is to facilitate continued operations during transition to the offshore patrol cutter by extending the service life of 270-foot cutters for up to 10 years. Work began on one prototype vessel at the Coast Guard Yard in July 2021 and on the second cutter in April 2022. Full production is scheduled to begin in 2023.
- Major maintenance availability program for the 175-foot coastal buoy tenders has been approved, beginning with the planned order of long lead-time material to support future production. Coastal buoy tenders serve the Coast Guard in a variety of missions and are tasked with maintaining aids to navigation, search and rescue, law enforcement, migrant interdiction, marine safety inspections, environmental protection and natural resources management. Keeper-class cutters are also used for light ice breaking operations.
- Service life extension program for Coast Guard Cutter Healy will occur in a five-year phased production between 2026 and 2030. Healy is a 420-foot cutter, the service’s only active medium polar icebreaker, which was commissioned in 1999. When completed, the SLEP effort will recapitalize a number of major systems and extend the service life of the cutter until the polar security cutters are operational.
- Service life extension program for the 47-foot motor lifeboats (MLB) is being conducted in partnership with the Boats Acquisition Program to take advantage of the program's subject matter expertise, reduce support costs and improve operational availability. The service life extension work will significantly overhaul up to 107 of the service’s 117 47-foot MLB fleet. The 47-foot MLB fleet was placed in service during the 1997-2002 timeframe with an expected service life of 25 years. The 47-foot MLB SLEP was initiated to extend the useful life of the MLB fleet by 20 years through 2047. The SLEP will reduce support costs and improve operational availability through renewal of the propulsion, electrical, steering, towing, navigation, and hull and structural systems, along with other minor work items.
2025
April 15, 2025 - Polar Star begins final phase of service life extension work
March 21, 2025 - Coast Guard Cutter Spencer completes service life extension program
2024
Aug. 29, 2024 - Coast Guard completes fourth phase of service life extension work on Polar Star
Aug. 26, 2024 - Sequoia completes major maintenance work
July 26, 2024 - 270-foot medium endurance cutter Legare begins service life extension program at Coast Guard Yard
June 21, 2024 - Coast Guard starts fourth phase of work to extend Polar Star's service life
2023
Nov. 22, 2023 - Coast Guard Yard removes two 27-ton engines as part of medium endurance cutter service life extension program
Oct. 20, 2023 - Coast Guard completes third phase of Polar Star service life extension program
Oct. 16, 2023 - ISVS completes HVAC work on nine 140-foot icebreaking tugs
Aug. 16, 2023 - Coast Guard completes work on service life extension program prototype
June 14, 2023 - Coast Guard begins production phase of medium endurance cutter service life extension program
June 29, 2023 - First 47-foot motor lifeboats delivered following design modification to service life extension program
June 15, 2023 - Coast Guard completes 15-month upgrades on 225-foot seagoing buoy tender
June 7, 2023 - Coast Guard Cutter Mobile Bay completes HVAC upgrade
May 30, 2023 - Coast Guard begins third phase of Polar Star service life extension program
March 28, 2023 - Coast Guard awards contract for work on coastal buoy tenders
2022
Nov. 22, 2022 - Coast Guard continues HVAC work on 140-foot icebreaking tugs
Oct. 6, 2022 - Coast Guard completes service life extension work on fifth 47-foot motor lifeboat
Sept. 1, 2022 - Polar Star arrives at homeport after completion of dock work and sea trials during second phase of service life extension project
Aug. 29, 2022 - Coast Guard completes major maintenance availability on 12th seagoing buoy tender
June 30, 2022 - Coast Guard continues HVAC systems upgrades on 140-foot icebreaking tugs
April 21, 2022 - Coast Guard cutters mark SLEP milestones for ISVS Program
April 8, 2022 - Coast Guard Cutter Spar arrives at new homeport following major maintenance availability
2021
Sept. 24, 2021 - Coast Guard inducts five motor lifeboats into Service Life Extension Program
Sept. 20, 2021 - Coast Guard Cutter Cypress completes major maintenance availability
Aug. 16, 2021 - Eagle figurehead has landed at Coast Guard Yard
Aug. 10, 2021 - Seagoing buoy tender arrives at Coast Guard Yard for major maintenance
June 23, 2021 - Coast Guard Cutter Thunder Bay completes HVAC upgrade
June 11, 2021 - Coast Guard Cutter Oak heads to homeport after completion of major maintenance availability
April 28, 2021 - Coast Guard begins HVAC upgrade on second 140-foot ice-breaking tug
April 1, 2021 - Seagoing buoy tender completes major maintenance availability
Feb. 23, 2021 - Coast Guard awards task order for Polar Star service life extension contract
Jan. 13, 2021 - Coast Guard awards Polar Star service life extension contract
2020
Nov. 23, 2020 - Seagoing buoy tender completes major maintenance availability
Sept. 18, 2020 - Coast Guard completes 140-foot icebreaking tug service life extension program
May 18, 2020 - Seagoing buoy tender undergoes phase two of major maintenance availability
April 15, 2020 - Renovation completed on seventh 225-foot seagoing buoy tender
Feb. 27, 2020 - Ninth 225-foot seagoing buoy tender arrives for major maintenance availability
Feb. 3, 2020 - Coast Guard releases request for proposal for Polar Star service life extension program
2019
Dec. 13, 2019 - Coast Guard releases request for information for Polar Star service life extension project
Oct. 8, 2019 - Renovation completed on eighth 140-foot icebreaking tug
Sept. 25, 2019 - Eighth 225-foot seagoing buoy tender arrives for midlife maintenance availability
Aug. 16, 2019 - Renovation completed on sixth 225-foot seagoing buoy tender
Aug. 6, 2019 - Coast Guard awards contract for 47-foot motor lifeboat service life extension program
June 28, 2019 - Coast Guard begins renovation of final 140-foot icebreaking tug
June 13, 2019 - Renovation completed on fifth 225-foot seagoing buoy tender
March 29, 2019 - Seventh 225-foot seagoing buoy tender arrives for midlife maintenance availability
2018
Dec. 20, 2018 - Renovation completed on seventh 140-foot icebreaking tug
Nov. 26, 2018 - RFP released for 47-foot motor lifeboat service life extension program
Nov. 9, 2018 - Renovation completed on fourth 225-foot seagoing buoy tender
Oct. 22, 2018 - Service life extension work completed on sixth 140-foot icebreaking tug
Sept. 11, 2018 - Coast Guard begins renovation of eighth 140-foot icebreaking tug
July 30, 2018 - New leaders take command at Legacy Sustainment Support Unit and Project Resident Office Gulf Coast
July 19, 2018 - Coast Guard releases request for information for Polar Star service life extension project
July 13, 2018 - Third round of industry input sought on 47-foot motor lifeboat service life extension program
June 11, 2018 - Renovation completed on third 225-foot seagoing buoy tender
April 27, 2018 - Coast Guard celebrates completion of service life extension work on Eagle
March 22, 2018 - Coast Guard Cutter Eagle undocks, approaches completion of renovations
Jan. 30, 2018 - Fifth 225-foot seagoing buoy tender arrives for midlife maintenance availability
2017
Dec. 11, 2017 - Industry input sought on 47-foot motor lifeboat service life extenion program
Nov. 20, 2017 - Renovations complete on fifth 140-foot icebreaking tug
Nov. 16, 2017 - Seventh 140-foot icebreaking tug arrives for renovation work
Sept. 11, 2017 - Coast Guard Cutter Eagle arrives for final renovation phase
Sept. 1, 2017 - Fourth 225-foot seagoing buoy tender arrives for midlife maintenance availability
Aug. 7, 2017 - Renovation completed on second 225-foot seagoing buoy tender
May 16, 2017 - Coast Guard Cutter Katmai Bay arrives at Yard
April 28, 2017 - Acquisition update: Coast Guard Cutter Eagle completes phase 3 of renovation
Feb. 23, 2017 - Renovation begins on third 225-foot seagoing buoy tender
2016
Nov. 7, 2016 - First 225-foot seagoing buoy tender completes overhaul
Oct. 28, 2016 - Coast Guard begins renovation of fifth 140-foot icebreaking tug
Sept. 28, 2016 - Acquisition update: In-Service Vessel Sustainment Program continues progress
March 22, 2016 - Coast Guard completes second phase of Eagle renovations
2015
Sept. 22, 2015 - Acquisition update: In-Service Vessel Sustainment Program expands; Eagle returns for phase 2 of renovations
July 9, 2015 - First 225-foot seagoing buoy tender begins midlife maintenance availability
Feb. 5, 2015 - Second 140-foot icebreaking tug starts renovation process
2014
Oct. 30, 2014 - Coast Guard Yard commences Eagle renovations
Sept. 29, 2014 - Acquisition update: Coast Guard Yard completes medium endurance cutter rehab; transitions to other cutters
2013
March 20, 2013 - Mikulski fights to protect jobs at U.S. Coast Guard Yard at Curtis Bay in senate passed continuing resolution