Innovation and Diversity

in Marine Design

RAstar SERIES

The RAstar escort/offshore terminal tug designation is reserved for a distinctive class of very high-performance ASD tugs, designed with the unique sponsoned hull form developed exclusively by Robert Allan Ltd., which has been proven in both model and full-scale testing to provide significantly enhanced escort towing and seakeeping performance. Escort forces are enhanced by the effects of the sponsons as well as by the prominent foil-shaped escort skeg forward. Roll motions and accelerations are less than half those of comparable sized “standard” wall-sided tug hulls.

rastar-waves

RAstar tugs will typically be high-powered, intended for demanding escort operations in exposed areas such as many LNG terminals where a high standard of seakeeping is required.

RAstar series tugs are classified according to their approximate length, e.g. RAstar 3400 (34 metres length), and a range of powers can be accommodated within each hull size according to the specific operational needs. Accordingly there may be beam variations with the same length .

Acceleration-Roll-Charts-2015-1 Acceleration-Roll-Charts-2015-2

Series Features

  • The epitome of high-performance ASD escort tugs
  • Unique sponsoned hull-form for superior escort performance and improved sea-keeping
  • Roll response less than half of other standard designs
  • Use a RAstar when the going gets rough!

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RAstar CLASS OPTIONS

Presently, the following classes of RAstar tug designs are available

2700

LOA
26.90 m
Beam
13.25 m
Draft, min
4.9 m
Draft, max
5.5 m
BP, max
80 t

2800

LOA
28.20 m
Beam
12.60 m
Draft, min
5.1 m
Draft, max
5.7 m
BP, max
80 t

3000

LOA
30.00 m
Beam
12.60 m
Draft, min
5.3 m
Draft, max
5.8 m
BP, max
80 t

3200

LOA
32.00 m
Beam
12.80 m
Draft, min
5.6 m
Draft, max
6.2 m
BP, max
80 t

3200-W

LOA
32.00 m
Beam
13.20 m
Draft, min
5.6 m
Draft, max
6.5 m
BP, max
85 t

3400

LOA
34.00 m
Beam
14.50 m
Draft, min
6.2 m
Draft, max
6.7 m
BP, max
90 t

3500

LOA
35.00 m
Beam
12.80 m
Draft, min
4.6 m
Draft, max
5.1 m
BP, max
70 t

3600

LOA
35.80 m
Beam
13.50 m
Draft, min
5.7 m
Draft, max
6.5 m
BP, max
90 t

3600-W

LOA
35.80 m
Beam
14.50 m
Draft, min
6.0 m
Draft, max
6.6 m
BP, max
100 t

3800

LOA
38.00 m
Beam
12.80 m
Draft, min
4.6 m
Draft, max
5.5 m
BP, max
70 t

3800-W

LOA
38.00 m
Beam
14.50 m
Draft, min
6.5 m
Draft, max
7.4 m
BP, max
100 t

3900

LOA
39.10 m
Beam
14.70 m
Draft, min
6.2 m
Draft, max
7.2 m
BP, max
115 t

4000-DF

LOA
40.20 m
Beam
16.00 m
Draft, min
6.4 m
Draft, max
7.4 m
BP, max
120 t
(Dual Fuel)