[jarito]

This doesn't seem that useful? Svalbard would require significant, continued supply. Unless the Russian navy is able to own the Barrents Sea, any force on Svalbard could just be waited out. Once the diesel is out, the defenses go down and they freeze. Not to mention that it is well in range for medium range ballistic misses from Greenland, Iceland and the Nordics.

[m4rtink]

In 2025+ you also need to count in deniable accident inducing naval drones - both surface and underwater types. So their position would be even more untenable