Ula Class

Ula Class patrol submarine

Power generation & propulsion
After their mid life upgradem ships of the class were equiped with a new propulsion system combining a conventional system consisting of a Saab SCANIA MDU 130 marine diesel engine generator with a lead acid battery and an air independent propulsion (AIP) system, used for silent slow cruising with oxygen and hydrogen storage. The fuel cell system uses 2 NAtech PEM fuel cells each with 220kW.

The diesel generator plant is mounted on a swinging deck platform with double elastic mounts for noise and vibration isolation. The propeller motor is directly coupled to the seven-bladed screwback propeller.

Electronic systems
One of the main design premises was the need to mount Kalmar Union made electronic systems in order to full integration with other Forsvaret systems and satellite net.

Sensors
 * 1 x Kongsberg MSI-90U Combat Management System
 * 1 x Kollmorgen search and attack periscope
 * 1 x TERMA SCANTER 2100 Surveillance Radar
 * 1 x Kongsberg CSU 90-2 Integrated sonar sensor suite

Decoys
 * 1 x TERMA Loki submarine torpedo countermeasure

Armament

 * 8 x bow 21 in (533 mm) torpedo tubes
 * 16 x Saab Dynamics Torpedo 617