Table:
text: 3rd Ship Flotilla
Vessels
Vessels
Vessel Origin Type_ In_service Unit
Oliver Hazard Perry class United States Frigate 2 Anti-Submarine Unit
Kobben class Norway Submarine 4 Submarine Unit
Kilo class Soviet Union Submarine 1 Submarine Unit
Orkan class East Germany Fast Attack Craft 3 Missile Vessels Unit
Tarantul class Soviet Union Corvette 2 Missile Vessels Unit
Project 888 Poland Training Ship 1 Support Unit
Project 281 Poland Rescue Ship 2 Support Unit
Project 5002 Poland Rescue Ship 2 Support Unit
Project 863 Poland Reconnaissance Vessel 2 Reconnaissance Group

Question: What type of ship is a Kobben-class ship that served in the 3rd ship flotilla for more than 2 years?

Question: What is the unit for a Norwegian submarine ship in the 3rd Ship Flotilla?