"Main keyword is long coast, harbours operational throughout all of winter." Hit the nail on the head. The Norwegian fjords, due to their nature, would likely

"Main keyword is long coast, harbours operational throughout all of winter." Hit the nail on the head. The Norwegian fjords, due to their nature, would likely be one of the hiding places for a NATO fleet in a Soviet/Russian battle. Basically they would make the fleet, carriers or subs very hard to find by the one of the biggest threats posed by the Russians, the anti ship missiles launched by aircraft like the Bear. It would also make the Soviet/Russian attack submarines have to work a lot harder and become more exposed - esp to any anti-submarine warfare craft which might UK-Iceland-Norway triangle to operate from. By hiding in the fjords, NATO could still strike using conventional aircraft, cruise missiles or nuclear forces - while the Russian aircraft would have to be much more exposed in order to get a radar picture of where the NATO fleet would be hiding. The Norway coast also offers a wide open flank that NATO can use for attacking any Soviet/Russian nuclear missile submarines and/or attack subs which might try to sneak out over SOSUS into the Atlantic. It essentially has the effect of controlling any movement from the Baltic, Norweigan or Barents Sea - essentially the areas from which some of the most important Russian ports are. A combined fleet/marine assault on a Russian port would also be an option. NATO would also want to deny it to the Russians as it offers a close route to attacking the UK and arguably the Russians see it as an exposed flank.