The Pravda class or P-class submarines were built for the Soviet Navy in the mid-1930s.

The initial design envisaged 130 mm (5.1 in) guns for surface action.

Their main shortcomings were underpowered machinery, a long diving time and poor seakeeping.

Weakness in hull strength had to be remedied by stiffening and weight cutting.

Yakubov and Worth state that these were the least successful Soviet submarines of this era and were relegated to secondary duties upon completion.