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Fleet

Vessel Fleet

Our diverse fleet gives us huge versatility and, thanks to the management of our highly experienced crew, ISM can handle virtually any marine freight job required of us. Here’s a summary of our tugs and workboats.
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HANS

Builder

Damen 1906 Stan Tug, year of build 1998

Dimensions

Length overall 19.5m, Breath 6.04m, Max draft 2.6m

Bollard Pull & Power

22t, 1074kw 2x Caterpillar 3412

Features

Towing Winch 500m capacity of 28mm 12mtr/min, Tow hook 40t SWL, PORT and STBD Snatch Blocks for Pushing Configuration

Classification

Lloyds Registry and SCMS

Area of Operation

60nm offshore, National and International Operations

Capabilities

Coastal towage, river towage, and marine civil support

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Ism hans

SWS Endurance

Builder

Damen 1908 Multicat, year of build 2019

Dimensions

Length overall 18.26, Breath 8.06m, Max draft 2.2m

Bollard Pull & Power

14.1t, 894kw 2x Caterpillar C18

Features

Helia Crane 6.7t @10m, Anchor Handling, 2x Manual 40t push winches, Plough dredging

Classification

Bureau Veritas and SCMS

Area of Operation

20nm offshore, National and International Operations

Capabilities

Coastal towage, river towage, plough dredging, marine civil support, anchor handling and dredge pipe support

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Ism endurance

SWS Suffolk

Builder

Scheepswerf H, de Haas push tug, year of build 1972

Dimensions

Length overall 13.02m, Breath 6.55m, Max draft 1.8m

Bollard Pull & Power

8.1t, 633kw 2x Mitsubishi S6A3MPTA

Features

2x Hydraulic Push winches 40t, Hydraulic Wheelhouse raising and lowering Maximum height 11m

Classification

Port of London Thames Freight Standard

Area of Operation

Categorised D waters, Inland Water Ways

Capabilities

River towage and marine civil support

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Ism suffolk

GRS Enterprise

Builder

Damen PushyCat 42, year of build 1973

Dimensions

Length overall 12.5m, Breath 3.4m, Max draft 1.6m

Bollard Pull & Power

4t, 298kw 1x Hyundai 4L123 IMO Tier III

Features

Tow hook 10t SWL, New 2024 engine fitted, meets IMO Tier III standards

Classification

SCMS workboat code

Area of Operation

20nm offshore, National

Capabilities
River towage, marine civil support and small creek operation
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Ism enterprise

SWS Essex

Builder
Damen 1205 Stan Tug, year of build 2012
Dimensions
Length Overall 13.08, Breath 5.28m, Max draft 1.8m
Bollard Pull & Power
8.84t, 442kw 2x Volvo Penta D9
Features
2x Manual 25t push winches, Tow hook 15.2t SWL
Classification
Bureau Veritas and SCMS
Area of Operation
60nm offshore, National and International operations
Capabilities
River towage, marine civil support and shallow draft operations
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Ism essex

Express

Builder

Tosher Tug, year of build 1950

Dimensions
Length Overall 12.5m, Breath 3.2m, Max draft 1.8m
Bollard Pull & Power
2.5t, 238kw 1x Doosan MD196TI
Features
Tow hook 15t SWL, Shallow Air Draft for canal operations
Classification

Port of London Thames Freight Standard

Area of Operation
Categorised C waters, Inland Water ways
Capabilities
River Towage, Marine Civil support and Small Creek Operation
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