River-class patrol ships are a poor shortcut to Arctic escort capability

What would it take to make a River-class batch Arctic-capable to escort the proposed Canadian amphibious ship?

Extensive hull rebuilding is expected, making the Finnish alternative more attractive; its class is not clearly identified.

The proposed Arctic escort conversion receives a negative answer because it would amount to rebuilding the River-class hull. The response treats that scale of work as a costly way to acquire the capability. Teimu's Finnish alternative is preferred because it is already designed for the intended mission. The vessel's class is not named in this passage, so no specific Finnish design is established here.