Here is a technical summary for the ULA class submarine KNM Utvaer that was mentioned in the article.

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Ula class coastal submarines  (from HazeGray)

Displacement: 1,150 tons submerged
Dimensions: 59 x 5.4 x 4.6 meters/193.6 x 17.7 x 15.1 feet
Propulsion: Diesel-electric, 2 diesels, 1 shaft, 6,000 hp, 23 knots
Crew: 18-20
Sonar: CSU-83 suite, Sintra flank
Armament: 8 21 inch torpedo tubes (14 torpedoes)

Concept/Program: A joint Norwegian-German project; the combat systems are Norwegian, attack sonar is German, flank sonar is French, hull sections were built in Norway, and the boats were assembled in Germany.

Builders: Thyssen Nordseewerke, Emden, Germany.

Number    Name            Year   
S300    Ula            1989
S301    Utsira            1992
S302    Utstein            1991
S303    Utvaer            1990
S304    Uthaug            1991
S305    Uredd            1990

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There is also a very up to date article at Wikipedia.

I understand that there are disagreements within Norway about the political process that led to this deployement, and I think that type of disagreement is healthy for any democracy.  Nevertheless, I think that this is a good example of how to use military forces to prevent violence before it occurs, and it is very nice to see the NATO allies working together again.