They licensed the plans for the Folgore class and, in modifying it for their purposes, overloaded a design that was already somewhat marginally stable.

Variations in fuel oil capacity meant that the range of the Gnevnys varied between 1,670 to 3,145 nautical miles (3,093 to 5,825 km; 1,922 to 3,619 mi) at 19 knots (35 km/h; 22 mph).

They were fitted with a set of Mars hydrophones for anti-submarine work, although they were useless at speeds over 3 knots (5.6 km/h; 3.5 mph).

[6] The ships were equipped with two K-1 paravanes intended to destroy mines and a pair of depth-charge throwers.

198 (Andre Marti South) in Nikolayev on 23 August 1936 as yard number 325 and were then railed to Shipyard No.