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Seagoing tugs
Type Rock (Type MB-51)

NATO: --- Class


Completed

3 units


Ships

Midland Shipyards, Midland, Canada

Name
Yard
Laid Down
Launched
Commissioned
Note
MB-57
25
-
-
04.1946
from 16.05.1949 - MB-27, from 21.07.1965 - OT-31
MB-56
26
-
-
04.1946
from 16.05.1949 - MB-21, from 16.06.1958 - RB-235
MB-55
27
-
-
06.1946
from 16.05.1949 - MB-22, from 16.06.1958 - RB-236

Former Royal Canadian Navy tugs: MB-55 (till 1946 Rock Crystal), MB-56 (till 1946 Rock Trash), MB-57 (till 1946 Rock Hawk)
Reclassified into a harbor tugs


General characteristics - Type Rock (Type MB-51)

Displacement (tons):
Standard:-
Full load:-
Dimensions (m):
Length:32
Beam:9,14
Draft:3,79
Speed (knots):14
Range:-
Autonomy (days):-
Propulsion:1x1000 hp steam machine, 1 fixed pitch propeller
Capacity (tons):-
Complement:-

Schematics

---


Modernizations

Bon-heater: OT-31 (MB-57) 23.06.1965


Fleets

Baltic Fleet: MB-55 (from 1949 Pacific Fleet), 56 (from 1949 Pacific Fleet), 57 (then Pacific Fleet)


Hull Numbers

---


Decommissioned

1962 MB-56 (4.01)
1972 MB-57 (6.08)
1975 MB-55 (10.05)


Export

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