how deep are the coastal waters around Norway? Do any boomers pay visits?
Norway's coastal waters, discounting the narrow waterways between the mainland and its outlying islands:
Are typically anywhere between 50 and 200 meters, but quickly open up to around 2000 meters for the Norwegian sea, but only an average of 250 meters for the very shallow Barents Sea.
SSBNs and SSGN, high displacement submarines, do frequent these waters with Russian submarines often transiting both seas on deterrence patrols. This Russian Delta IV was photographed in the Barents Sea, which is North of the Norwegian mainland:
By and large they transit the deeper ocean parts though and stay away from the heavily monitored Norwegian waters which NATO, the US and Norway have mined with sensors.
heck maybe Finland may be inclined to go for some subs too.
The Finns haven't operated submarines since Saukko was decommissioned in 1947, and it was only 100 tons:
The Gulf of Finland only averages about 100 meters and the Gulf of Bothnia only 60 meters in average depth, so the waters surrounding Finland aren't prime submarine real-estate. The larger Baltic Sea averages just 55 meters. Their regional waters are very shallow.
By comparison, the Persian Gulf, also not known as prime submarine territory, has an average depth of 50 meters. Iran, with the most submarines in the region, primarily uses small coastal defense mini subs like the Ghadir class. They have larger subs too including 3 kilos, but they rarely operate in the shallow Persian Gulf and are more oriented towards ocean activities.
Finland may opt for submarines again, but I have to imagine they'd be smaller classes given the regional topography.
Then again both Sweden and Poland are operating submarines and are procuring larger ones (A26 and possibly Type 212 respectively), so it's not as if Finland couldn't, but it makes less sense for them given the restricted nature of their surrounding waters versus Sweden or Poland who open up to more of the Baltic Sea versus being confined mainly to shallow, narrow gulfs like Finland.
You know it won't hurt your pride to help us protect your waters once in a while
Oh I'm not trying to hate on you guys,
@waz knows I love our British friends very much and advocate for stronger ties with North Atlantic nations (Russia included). I just don't feel to partial to any suggestions of our nation relying on you solely. Help is fine, but we'll do our part too.
So you think German carry the legacy of U boat and still sustain.
I think that Germany still builds conventional submarines where as the Americans strictly design and procure nuclear boats, so comparing their respective technologies is difficult since neither has a lot of experience with the others niche.
Any country in the world ever used sub as rapid deployment tool in restive zone ?
Subs are usually first on station during hot conflicts in the USN, before carriers or destroyers arrive on scene, so the US Navy does. Other nations operate with submarines mostly acting as fleet support or as singular or grouped units conducting offensive maneuvers, the so-called Wolfpack hunter-killer teams.
Submarines are not usually used to rapidly deploy troops or other assets beyond AUVs or UAVs though. They tend to lack the space needed for mass deployments.
Special forces are the exception, such as these MJK operatives deploying from a Norwegian Ula class submarine.
The submarine shown in the video appears to be S303 HNoMS Utvær: