The Norwegian warship HNoMS Rap was a torpedo boat built in 1873.

Her initial commanding officer was First Lieutenant Koren, who also designed the torpedo racks.

With a displacement of less than ten tons, Rap was very limited in terms of endurance and seaworthiness.

Over the next three decades Rap would be followed by many other Norwegian torpedo boats of ever-increasing size and complexity.

Rap was also the name given to a class of six motor torpedo boats built for the Royal Norwegian Navy in the 1950s.