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| Type BTP |
Description. Motor ships of the types BTP and PAVLIN VINOGRADOV (projects 81170, 81172 and 81173N) are the mid-size line tug-pushers and raft tugs, including those equiped with lifting wheel-house, intended for central and eastern rivers. Pushers for central rivers are equipped with the automated barge-holding device of the O-150T-8 type, for eastern rivers - of the UDR-50K type. Serial name (BTP-600) means buksir-tolkach-plotovod or 'tug-pusher/raft tug', 600 h.p..
Modifications. Ships of the initial project 81170 were built for eastern basins; project 81172 is a modification for central basins. Project 81173N has lifting wheel-house.
Serial building. Ships of the project 81170 were built since 1985; not less than 3 units were built. Ships of the project 81172 were built since 1986; not less than 10 units were built. Ships of the both projects were assigned serial numbers starting from 601. Ships of the project 81173N were built since 1994; 2 units are considered to be built.
Distribution. Pushers of the project 81170 were delivered to Yenisey and Lena shipping companies, pushers of the project 81172 - to Moscow, Belaya, Kama and Northern shipping companies for work on Volga, Kama, Moscow-Volga canal and Northern Dvina river. In 90-ties some ships are considered to be laid up for absence of work. Pushers of the project 81173N were planned to be built for Northern Shipping Company.
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| Projects 81170, 81172 | |
| Year of built and the name of the leading ship |
81170 - 1985, A. VAKUTIN
81172 - 1986, PAVLIN VINOGRADOV |
| Mission | line tug-pusher, raft tug |
| Place of built | USSR |
| Shipyard |
81170 - Krasnoyarsk shipbuilding plant,
81172 - Limenda shipbuilding-shiprepairing plant |
| River Register class | O (ice) |
| Length / width / draught, m | 34.4 / 10.3 / 1.4 |
| Machine power, h.p. | 600 |
| Speed (without a barge), km/h | 18 |
| Project 81173N | |
| Year of built of the leading ship | 1994 |
| Mission | line tug-pusher |
| Place of built | USSR |
| Shipyard | Limenda shipbuilding-shiprepairing plant |
| River Register class | O (ice) A |
| Length / width / draught, m | 34.4 / 10.4 / 1.5 |
| Machine power, h.p. | 700 |
| Speed (without a barge), km/h | 18.5 |
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