HNoMS Ula (S-300) was laid down on January 29th, 1987, launched on July 28th, 1988 and commissioned into service on April 27th, 1989. Ula was damaged by a practice torpedo during its trials being held in 1989.
HNoMS Utsira (S-301) saw her construction begin on June 15th, 1990 and she was launched to sea on November 21st, 1991. Commissioning arrived on April 30th, 1992.
HNoMS Ultstein (S-302) saw her keel laid down on December 6th, 1989 and was launched on April 25th, 1991, commissioned for service on November 14th of that year.
HNoMS Utvaer (S-303) was under construction beginning December 8th, 1988, was launched on April 19th, 1990 and commissioned on November 8th of that year.
HNoMS Uthaug (S-304) had its keel laid down on June 15th, 1989, was launched on October 18th, 1990 and commissioned for service on May 7th, 1991.
HNoMS Uredd (S-305) was under construction was soon as June 23rd, 1988, was launched to sea on September 22nd, 1989 and formally commissioned on May 3rd, 1990. Uredd took damage during a docking action in March of 1991 and suffered an onboard fire in February of the following year.
The Ula-class will most likely see active service with the Royal Norwegian Navy for the foreseeable future. Modernization of the fleet took place in the middle of the last decade (2006 to 2008) and this period saw the group have their Electronic Warfare (EW) suites modernized as well as new communications equipment installed. Warm weather equipment was also introduced after the Mediterranean tours brought about the need for improved crew comfort in that environment. The joint German-Italian "Type 212" class diesel-electric submarine is viewed as the official replacement for the Ula-class - which could happen as soon as mid-2025.
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