At the end of 2021, the construction of a series of project ST6H-A1 Raznezhye modular boats began at the Sea Tech production site in Gorodets.

In June 2023, the lead vessel of the project ST6H-A1 was presented to the State Inspectorate for Small Craft of the Nizhny Novgorod region. The trials were successful. Based on the survey results, the certificates were issued for the vessel registration and for the construction of a series of open cockpit boats.

September 2025. The RusBoats.ru portal released a major report from the boat construction site. The video also features a test drive of the project ST6H-A3 boat and an interview with chief designer Dmitry Mitrofanov (in Russian). Watch the full video below: