Analysis of information sources in references of the Wikipedia article "USCGC Polar Star" in English language version.
And it laid out a set of options for the Coast Guard's Arctic capability, which included:...25-year service life extensions for the older ships, at a cost of about $400 million per ship.
And it laid out a set of options for the Coast Guard's Arctic capability, which included:...25-year service life extensions for the older ships, at a cost of about $400 million per ship.
 This article incorporates text from this source, which is in the public domain.
 This article incorporates text from this source, which is in the public domain. This article incorporates text from this source, which is in the public domain.
 This article incorporates text from this source, which is in the public domain.