KS-type boats — shallow-draft planing waterjet vessels — were originally developed by the Kostroma Marine Engineering Plant Design Bureau, based on German logging tug prototypes. The plant has been producing various modifications of these boats for a long time. Following the Kostroma plant, similar vessels (the Transal type) began to be manufactured by AKS-Invest. Both KS and Transal boats have gained widespread recognition, proving themselves on Russian rivers as affordable, multi-purpose watercraft with excellent operational characteristics, maintaining steady market demand.

Responding to client requests for similar vessels (shallow-draft, planing, with good seakeeping in choppy waters, and 10–14 meters in length), Sea Tech has developed a range of technical proposals and projects. These include the ST11 utility boat, as well as the Eger and Ohta boats in various configurations.