Seagoing self-propelled dry-cargo barges, border guard transports
Project 431
Project 431M
Project 431PU

Seagoing self-propelled artillery barges
Project 431A

Seagoing self-propelled torpedo barges
Project 431T
Project 431TU

Seagoing self-propelled tank barges
Project 431R

Trials ships
Project 431PS

Harbor degaussing vessels
Project 431U

NATO: --- Class

Completed

? units

Ships

Shipyard №870, Vyborg (17 units Project 431, 9 units Project 431A, 4 units Project 431M, 9 units Project 431TU, 5 units Project 431PU, 1 unit Project 431PS), Tallinn Morskoy Zavod (since 17.05.1951 Morskoy Zavod №7 – 17 units Project 431, 431M: I comm.1955, 2 units in 1957), Kronshtadt (Project 431TU), Ilichevsk Shipyard №490 (Project 431, 431M), Zelenodolsk Shipyard №340 (Project 431), Khabarovsk (Project 431)

Project 431 - 37 units (since 1948)

Project 431A (since 1954)

Project 431M

Project 431PU

Project 431TU (since 1957)

Project 431R

Project 431PS (since 1960)

Project 431U

Project ? : MAB-53150, MAB-57150, MBSS-8150 (№638, comm.1959, Tallinn Shipyard?, 35,66x?x1,89 m, 9 kts, 1 diesel generator x25 kW, 1 diesel generator x12 kW), MBSS-27150 (№641, comm.1962, Tallinn Shipyard), MBSS-141150, MBSS-142150, MBSS-144150, MBSS-144150, MTB-2150 (183/? tons), MTB-19150, MTB-109150, MTB-114150

Project 431 - dry cargo, Project 431A - artillery rounds transport, Project 431M - mines transport, Project 431TU - torpedoes transport, Project 431PU - liquid oxigen for Project A615 submarines, Project 431PS - torpedoes test stations

Tranferred since civil fleet: №27 in 1957, №30 in 11.1957, №40. №46 former PS-22 of the Factory №832

General characteristics - Project 431

Schematics

Seagoing self-propelled dry-cargo barge - Project 431

Modernizations

Trials ship - Project 257DM OS-94 (MBSS-35). ?/205 tons, 8 kts, 5 days
On MBSS-8150 in 1985? diesel 3D12 replaced by 3S12A
Floating shops – PM-144 (Northern Fleet)
Target-ship – SM-505 (№62)
Converted into dredgers: MBSS-142150, MBSS-148150

Fleets

Baltic Fleet: MBSS-8150, 12150, 35150?, 99150, 136150, 156150, 244150, MAB-39150, 55150, 56150, MTB-16150, 19150, 114150, PTR-50, 51, №2, 3, 11, 16, 20, 27, 30, 33, 40, 45, 53, 57, 58
Black Sea Fleet: MBSS-135150, 141150, 142150, 148150, 155150, 176150, MAB-57150, 59150, MTB-12150, 13150, 109150, 113150, MNS-30150, RSR-426, PTR--52 (then Northern Fleet, then Baltic Fleet), 53 (then Northern Fleet), №52
Northern Fleet: MBSS-27150, 93150, 144150, 154150, 160150, 210150, MAB-53150, MTB-2150, 4150, 7150, 8150, 10150 (then Baltic Fleet), 18150, 110150, №1, 4, 5-7, 9, 10, 12-15, 17-19, 31, 32, 59-62
Pacific Fleet: MBSS-3150, 25150
Amur: №403

Hull Numbers

MBSS-154150?: 31(1958)
PSKR-480: 480
PTR-50: 139?(1995)
PTR-51: 066(1991)
PTR-52: 018?
PTR-53: 016

Decommissioned

MAB-39150 (dry-cargo ship MAB-39, to scrap 2014), MBSS-3150 (civil ship AO Kamchatsky torgmortrans without rename, then OOO Kamchatka-Tekhno-Plus, decomm. 2003), MBSS-136150 (converted by Project 431/502/49 Pingvin, Volgo-Baltiyskogo GBUVPiS), №6 (dry cargo ship Tikhiy, modernizied by Project 431B)
As civil ship after decommissioning: Asta (Lithuania, since 01.1997 Natali, comm. 1959, Vyborg Shipyard, since Baltic Fleet), RMN15-24 (since Northern Fleet)
1982 – MBSS-154150 (dry-cargo ship Dauriya of the Karelrybflot, since 20.0.2005 OAO Arkhangelsky opytovy vodoroslevy kombinat)
1992 – MBSS-8150 (dry-cargo ship Antares Baltika)
1994 – MBSS-25150 (5.07)
1998 – №9
2003 – №403 (19.08, OOO Nauchnye expeditcii i puteshestviya, converted by Project 431/B431 to civil ship-refregirator Komsomolsk, then OOO Berezovyy), sank in 2018 in Khabarovsk
2008 – MBSS-12150
2009 – MNS-30150
2010 – MBSS-27150 (3.06, OAO 10 SRZ without rename)
2012 – MBSS-210150

Export

Azerbaijan: 1 unit
T756

Ukraine: 1 unit
Trials ship Kasatka, since 1999 Kamyanka U860, since 2018 A860 (till 1.08.1997 MBSS-155150). Converted to seagoing dive boat.