The following is the April 29, 2024, Congressional Research Service report, Coast Guard Polar Security Cutter (Polar Icebreaker) Program: Background and Issues for Congress.
From the report
Required number of polar icebreakers. A 2023 Coast Guard fleet mix analysis concluded that the service will require a total of eight to nine polar icebreakers, including four to five heavy polar icebreakers and four to five medium polar icebreakers, to perform its polar (i.e., Arctic and Antarctic) missions in...
https://news.usni.org/2024/05/02/report-to-congress-on-polar-security-cutter-program