Combat Boat 90 (CB90) is a class of fast military assault craft originally developed for the Royal Swedish Navy by Dockstavarvet. In addition to the many variants in service with the Swedish Navy under the Strb 90 H designation, the CB 90 has been adopted by the navies of several countries, including Norway (as the S90N), Greece, Mexico (as the CB 90 HMN) and Malaysia. Also the German Navy plans to equip the Berlin class replenishment ships with the CB90.

The CB90 is an exceptionally fast and agile boat. It is light weight, shallow draught and twin water jets allow it to operate at speeds of up to 40 knots (74 km/h) in shallow coastal waters. The water jets are partially ducted, which, along with underwater control surfaces similar to a submarine's diving planes, allows the CB90 to execute extremely sharp turns at high speed, decelerate from top speed to a full stop in 2.5 boat lengths, and adjust its pitch and roll angle while under way.