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FIGHTING SHIPS OF THE WORLD
RUSSIA / USSR
MINE WARFARE SHIPS
TM-21 minehunters (projects 257D, 257DM, 257DME, 257V) (1961 - 1972)


Photo



1975

Ships


Name No Yard No Builder Laid down Launched Comp Fate Modification
TM-21, 5.1966- БТ-211 [BT-211]   01 789 Yd, Petrozavodsk     1962 stricken 6.1979 Project 257D
TM-8, 5.1966- БТ-178 [BT-178]   02 789 Yd, Petrozavodsk     1963 stricken 1980s Project 257D
TM-18, 5.1966- БТ-75? [BT-75]   03 789 Yd, Petrozavodsk     1962 stricken 1983? Project 257D
TM-22, 5.1966- БТ-122 [BT-122]   04 789 Yd, Petrozavodsk     1963 stricken 1980s Project 257D
TM-25, 5.1966- БТ-117 [BT-117]   05 789 Yd, Petrozavodsk     1962 stricken 1980s Project 257D
TM-29, 5.1966- БТ-120? [BT-120]   06 789 Yd, Petrozavodsk     1963 stricken 1983? Project 257D
TM-4, 5.1966- БТ-176? [BT-176]   07 789 Yd, Petrozavodsk     1961 stricken 8.1993? Project 257D
TM-31, 5.1966- БТ-231 [BT-231]   08 789 Yd, Petrozavodsk     1963 stricken 1994 Project 257D
TM-24, 5.1966- БТ-360? [BT-360]   1101 Primorskiy, Leningrad     1962 stricken 6.1993? Project 257D
TM-27, 5.1966- БТ-101? [BT-101]   1102 Primorskiy, Leningrad     1963 stricken 1980s Project 257D
TM-15, 5.1966- БТ-116? [BT-116]   1103 Primorskiy, Leningrad     1963 stricken 1980s Project 257D
TM-10, 5.1966- БТ-148? [BT-148]   1104 Primorskiy, Leningrad     1964 stricken 1989 Project 257D
TM-13, 5.1966- БТ-218? [BT-218]   1105 Primorskiy, Leningrad     1964 stricken 1988 Project 257D
TM-41, 5.1966- БТ-416 [BT-416]   1106 Primorskiy, Leningrad     9/1965 stricken 4.1990 Project 257D
TM-45, 1965- Комсомолец Киргизии [Komsomolets Kirgizii]   1107 Primorskiy, Leningrad     1965 stricken 1987 Project 257D
TM-35, 5.1966- БТ-356 [BT-356]   701 Vladivostok SY     11/1964 stricken 10.1986 Project 257D
TM-2, 5.1966- БТ-246 [BT-246]   702 Vladivostok SY     12/1964 stricken 6.1981 Project 257D
TM-5, 5.1966- БТ-247 [BT-247]   703 Vladivostok SY     12/1964 stricken 4.1990 Project 257D
TM-14, 5.1966- БТ-442 [BT-442]   704 Vladivostok SY     1965 stricken 7.1986 Project 257D
TM-15, 5.1966- БТ-447 [BT-447]   705 Vladivostok SY     1965 stricken 1990 Project 257D
TM-16, 5.1966- БТ-116? [BT-116]   09 Avangard, Petrozavodsk     10/1964 stricken 1981 Project 257DM
TM-39, 5.1966- БТ-153? [BT-153]   10 Avangard, Petrozavodsk     1965 stricken 1988 Project 257DM
TM-1, 5.1966- БТ-1 [BT-1]   11 Avangard, Petrozavodsk     1964 stricken 1986 Project 257DM
TM-33, 5.1966- БТ-33 [BT-33]   12 Avangard, Petrozavodsk     1965 stricken 1987 Project 257DM
TM-9, 5.1966- БТ-234? [BT-234]   13 Avangard, Petrozavodsk     1964 stricken 1980s Project 257DM
TM-37, 5.1966- БТ-37 [BT-37]   14 Avangard, Petrozavodsk     1965 stricken 1988 Project 257DM
TM-6, 5.1966- БТ-237? [BT-237]   15 Avangard, Petrozavodsk     1964 stricken 1990 Project 257DM
TM-43, 5.1966- БТ-251? [BT-251]   26 Avangard, Petrozavodsk     1966 stricken 1990 Project 257DM
БТ-124 [BT-124]   27 Avangard, Petrozavodsk     1966 stricken 1988 Project 257DM
БТ-449 [BT-449]   28 Avangard, Petrozavodsk     1966 test vessel 1982 Project 257DM
БТ-70 [BT-70]   29 Avangard, Petrozavodsk     10/1965 stricken 4.1990 Project 257DM
TM-93, 5.1966- БТ-315? [BT-315]   30 Avangard, Petrozavodsk     1967 stricken 1988 Project 257DM
БТ-83 [BT-83]   31 Avangard, Petrozavodsk     1967 wrecked 9.1.1982 Project 257DM
БТ-255 [BT-255]   32 Avangard, Petrozavodsk     1967 stricken 1990 Project 257DM
БТ-259 [BT-259]   33 Avangard, Petrozavodsk     1967 stricken 5.1993 Project 257DM
БТ-261 [BT-261]   34 Avangard, Petrozavodsk     1967 stricken 1987 Project 257DM
БТ-268 [BT-268]   35 Avangard, Petrozavodsk     1968 stricken 1980s Project 257DM
БТ-335 [BT-335]   36 Avangard, Petrozavodsk     1968 stricken 1990 Project 257DM
БТ-334 [BT-334]   37 Avangard, Petrozavodsk     12/1968 stricken 4.1990 Project 257DM
БТ-329 [BT-329]   39 Avangard, Petrozavodsk     1969 stricken 1991 Project 257DM
БТ-273 [BT-273]   41 Avangard, Petrozavodsk     1969 stricken 1991 Project 257DM
БТ-271 [BT-271]   42 Avangard, Petrozavodsk     1969 stricken 1980s Project 257DM
БТ-275 [BT-275]   43 Avangard, Petrozavodsk     1970 stricken 5.1993 Project 257DM
БТ-305 [BT-305]   44 Avangard, Petrozavodsk     8/1970 stricken 4.1990 Project 257DM
БТ-307 [BT-307]   45 Avangard, Petrozavodsk     1970 stricken 1980s Project 257DM
БТ-312 [BT-312]   47 Avangard, Petrozavodsk     1970 stricken 1980s Project 257DM
БТ-251 [BT-251]   48 Avangard, Petrozavodsk     1969 explosion 19.8.1989 Project 257DM
БТ-318 [BT-318]   50 Avangard, Petrozavodsk     1971 stricken 1980s Project 257DM
БТ-3? [BT-3]   706 Vladivostok SY     1966 stricken 1984 Project 257DM
БТ-87 [BT-87] (ex-TM-87)   707 Vladivostok SY     1966 stricken 1982 Project 257DM
БТ-85 [BT-85] (ex-TM-85)   708 Vladivostok SY     4/1967 stricken 4.1990 Project 257DM
БТ-282 [BT-282]   709 Vladivostok SY     1967 stricken 1982 Project 257DM
БТ-284 [BT-284]   710 Vladivostok SY     8/1968 stricken 4.1990 Project 257DM
БТ-201 [BT-201]   711 Vladivostok SY     12/1968 stricken 1985 Project 257DM
БТ-277 [BT-277]   712 Vladivostok SY     6/1969 stricken 4.1990 Project 257DM
БТ-279 [BT-279]   713 Vladivostok SY     1969 stricken 5.1989 Project 257DM
БТ-314 [BT-314]   714 Vladivostok SY 1969 1970 6/1970 stricken 5.1989 Project 257DM
БТ-316 [BT-316]   715 Vladivostok SY     9/1970 foundered 22.12.1984 Project 257DM
БТ-338 [BT-338]   716 Vladivostok SY     1971 stricken 1989 Project 257DM
БТ-358 [BT-358]   717 Vladivostok SY     1971 stricken 1988 Project 257DM
БТ-103 [BT-103]   718 Vladivostok SY     1972 stricken 1989 Project 257DM
БТ-569 [BT-569]   38 Avangard, Petrozavodsk     1968 to Bulgaria 9.1970 (31) Project 257DME
БТ-154 [BT-154]   40 Avangard, Petrozavodsk     1969 to Bulgaria 9.1970 (32) Project 257DME
БТ-... [BT-...]   46 Avangard, Petrozavodsk     1970 to Bulgaria 1971 (33) Project 257DME
БТ-569 [BT-569]   49 Avangard, Petrozavodsk     1971 to Bulgaria 1971 (34) Project 257DME
БТ-435 [BT-435]   216 Avangard, Petrozavodsk     1969 stricken 1993 Project 257V


Technical data


Displacement standard, t

pr. 257D: 246

pr. 257DM, 257DME, 257V: 254
Displacement full, t

pr. 257D: 260

pr. 257DM, 257DME, 257V: 270
Length, m

40.5
Breadth, m

7.70
Draught, m

pr. 257D: 2.01

pr. 257DM, 257DME, 257V: 2.08
No of shafts

2
Machinery

2 M-870FTK diesels
Power, h. p.

2400
Max speed, kts

14
Fuel, t

diesel oil
Endurance, nm(kts)

pr. 257D: 1500(10)

pr. 257DM, 257DME, 257V: 1200(10)
Armament

pr. 257D: 1 x 2 - 30/71 AK-230M, 2 DCR (27), 8 - 12 mines, IU-1 USV, IT-3 USV, I-2 USV

pr. 257DM, 257DME: 1 x 2 - 30/71 AK-230M, 2 DCR (27), 8 - 12 mines, IU-1 USV, IT-3 USV, I-2 USV or MT-3 or TS-1 mechanical or PEMT-4 magnetic, AT-2 acoustic or ST-2 magnetic minesweeping gear or 2 200m-long mine-clearing line charges

pr. 257V: 1 x 2 - 30/71 AK-230M, 2 DCR (27), 8 - 12 mines, remote control equipment
Electronic equipment

Don radar, MG-69 Lan' sonar
Complement

pr. 257D: 40

pr. 257DM, 257DME, 257V: 32


Standard scale images


<i>TM-16 </i>1964
TM-16 1964
<i>BT-103 </i>1980
BT-103 1980
<i>BT-335 </i>1979
BT-335 1979
<i>TM-21 </i>1961
TM-21 1961


Graphics


1975
1975


Project history

This new coastal unit was conceived as a minehunter with substantially reduced signatures (magnetic, electric, acoustic and hydrodynamic). Project 257D was the wooden version; Project 257M was the version built of low-magnetic signature steel. The wooden version was adopted. The designers claimed that, in comparison with Project 265, they had reduced the magnetic signature by a factor of nearly 50, the acoustic signature by a factor of 8-10. and the electric signature by a factor of 5. They also claimed a significant reduction in the hydrodynamic (pressure) signature. The degaussing system included automatic coil control; the UEP signature was reduced by using dielectric coatings and insulation, and special sound damping machinery foundations were used. The low-noise propellers used air bubble shields (like the contemporary US Masker system). Sweep equipment was handled, for the first time, using hydraulics. The single gun was a special non-magnetic version of the AK-230.

Modernizations

1970s, all pr. 257D and 257DM: - I-2 USV; + IU-2 USV

1970s, BT-314 and some others: + 1 x 4 Strela-3 SAM

Naval service

BT-83 lost the anchor and drifted ashore at Baltiysk 9.1.1982 during a storm. BT-316 22.12.1984 foundered under tow in very difficult ice conditions off Cape Krasny Partizan. BT-251 was lost at Ochamchira 19.8.1989 after explosion of amunition.