The D-3-class, designated Project P-19, was a class of Soviet wooden motor torpedo boats (MTB) built before and during World War II.

In 1935 the Soviet Navy begun working on larger MTBs that possessed higher endurance than the previous numerous G-5 class.

[2] In 1942, due to lack of large enemy ships operating in within range of Kronshtadt, the local No.5 Shipyard created the Project P-19-O subchaser, armed with more powerful guns and 16 depth charges, though without submarine detection equipment.

[2] The most notable naval Soviet success of the class was at the Battle of Nerva Island where they sunk the Elbing-class large torpedo boat T31.

In Arctic, the D-3-class boat TKA-12 was successfully led by Aleksandr Shabalin who later become detachment commander of his unit and was decorated twice as Hero of the Soviet Union, this ship would be put on display as a memorial in the city of Severomorsk.