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Robert Allan Engineering & Design

RAstar Series

Model RAstar 2700 to 4200

Very high-performance ASD escort and offshore terminal tug designs using Robert Allan Ltd.'s proprietary sponsoned hull form and foil-shaped forward escort skeg.

Description

The RAstar escort/offshore terminal tug designation is reserved for a distinctive class of very high-performance ASD tugs built on the sponsoned hull form developed exclusively by Robert Allan Ltd. Model and full-scale testing have shown this hull to provide significantly enhanced escort towing performance; escort forces are increased by the sponsons and by a prominent foil-shaped escort skeg forward.

RAstar tugs are typically high-powered and intended for demanding escort operations in exposed areas. Designs are classified by approximate length, e.g. RAstar 3400 (34 metres), and a range of powers can be accommodated within each hull size, so beam may vary for the same length. Listed options run from the RAstar 2700 to the RAstar 4200, including -W, -SX and -DF variants.

Key features

  • Proprietary sponsoned hull form for escort performance and improved seakeeping
  • Foil-shaped forward escort skeg
  • Range of powers within each hull size

Applications

Tanker escort and offshore terminal support in exposed waters.

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