The Derak-class Heavy Prowler, named for Derak Ja'huni, was the first full scale ship design built by the Therali-Templar Institute. By the cold war of 100aby, the ship design was over 130 years old, but it was a solid design showing no sign of being replaced. Normally only a small number were kept in service, during 100aby there were only four dozen actively patrolling, with more in drydock. However by 135 ABY there were more than 200 active with more in drydock awaiting posts.