https://www.militaryperiscope.com/weapons/naval-warfare/small-combatants/grad-sviyazhsk-class-patrol-ships/overview/
Overview — GRAD SVIYAZHSK-class patrol ships — Small Combatants — Naval Warfare — Weapons —...
Now under construction, the GRAD SVIYAZHSK class is an enlarged version of the BUYAN-class patrol craft currently in the Russian border service. According to...
grad sviyazhskpatrol shipsnaval warfareoverviewclass