Vuyk Engineering Rotterdam was contracted by Smit Engineering to review a basic design for dynamically positioned anchor handling tug/supply vessels (AHTS) with 70-ton and 120-ton bollard pull capabilities. Smit ordered two 70-ton AHTS from a shipyard in Singapore, with an option for two 120-ton AHTS, which they later exercised. Vuyk assisted Smit by comparing shipyard offers, advising on propulsion and thruster configurations to obtain DP-2 dynamic positioning classification.

1. Vuyk Engineering Rotterdam B.V.
Naval architects, Marine engineers, Consultants
P.O. Box 1, De Linie 7
2900 AA Capelle aan den IJssel
Phone +31 (0)10 450 25 00
Fax +31 (0)10 458 72 45
Email vuyk@vuykrotterdam.com
Website www.vuykrotterdam.com Values are for presentation only
Principal dimensions
Consultancy SMIT anchor
handling tug/supply vessels
70-ton bollard pull
AHTS
70.90 m
63.00 m
16.00 m
7.00 m
5.60 m
2x Wärtsilä, type 6R32
2x 2 460 kW
2x Lips CPP in nozzle
2x 1 200 kW
2x 540 kW
1x 150 kW
2x 550 kW
1x 500 kW
120-ton bollard pull
AHTS
70.90 m
63.00 m
16.00 m
7.00 m
5.60 m
2x Wärtsilä, type 9R32
2x 3 280 kW
2x Lips CPP in nozzle
2x 1 200 kW
2x 540 kW
1x 150 kW
2x 550 kW
1x 500 kW
Length overall
Length between perpendiculars
Breadth moulded
Depth moulded
Design draught
Main engines
Output
Propellers
Shaft generators
Auxiliary generators
Emergency generator
Bow thrusters:
Stern thruster
During the last quarter of 2003, Vuyk Engineering Rotterdam was contracted by
Smit Engineering - part of the SMIT Group - to review a basic design for a
dynamically positioned anchor handling tug/supply vessel (AHTS), providing a
basis for modular upgrading to diving support, oil recovery and other duties.
In the first phase, SMIT intended to order two 70-ton bollard pull vessels and one
120-ton bollard pull AHTS.
After an international tender, resulting in offers from yards in The Netherlands,
Norway, Spain and Singapore, Smit Transport & Heavy Lift B.V. ordered in March
2004 two 70-ton bp AHTS from the Keppel Singmarine yard in Singapore with an
option for two 120-ton bp AHTS. In July 2004 Smit exercised its option to build this
vessel.
VER project 03.344
Introduction
Machinery

2. Vuyk Engineering Rotterdam B.V.
Naval architects, Marine engineers, Consultants
P.O. Box 1, De Linie 7
2900 AA Capelle aan den IJssel
Phone +31 (0)10 450 25 00
Fax +31 (0)10 458 72 45
Email vuyk@vuykrotterdam.com
Website www.vuykrotterdam.com Values are for presentation only
Consultancy SMIT anchor
handling tug/supply vessels
All photos courtesy URS of Antwerp, Belgium
Classification
VER scope of work
All vessels are certfied by American Bureau of Shipping for the class notation:
A1(e), Offshore Support Vessel, Anchor Handling Towing Vessel, AMS,
ACCU, FiFi Class 1, +DPS-2
The first AHTS - named 'Smit Kamara' - has been contracted by the Nederlandse
Aardolie Maatschappij B.V.'(NAM) for a 5-year charter period.
The second 70-ton bollard pull AHTS - named 'Smit Komodo' - shall also be fitted
as Diving Support Vessel. For this purpose this vessel shall have two 850 kW bow
thrusters and two 550 kW stern thrusters, enhancing dynamic positioning
capabilities. Furthermore the vessel can accommodate 50 persons instead of 42
persons.
The 'Smit Komodo'' will be deployed on a long -term charter in Egypt and the 120
ton bollard pull 'Smit Nicobar', which is due for delivery June 2006 and will start a
charter in Sakhalin, Russia.
On March 31, 2006 SMIT announced that they have reached an agreement for the
purchase of seven newly built work vessels from Hadi H. Al-Hammam Est. of
Saudi Arabia. These vessels of approximately 75 tons bp are a modified version of
the 'Smit Kamara' and 'Smit Komodo'' The first two vessels of this new series will
be delivered during 2006 and the last one is expected to be delivered in 2008.
They will be managed by the SMIT Singapore organisation.
VER project 03.344
Speed
Bollard pull
Cargo deck area
Fire Fighting Class
Winch brake force
pull force
Winch drum capacity
Accommodation
70-ton bollard pull
AHTS
14.5 kn
83 ton
450 m²
Fi-Fi 1
225 ton
150 ton
2x 1 000 m x 58 mm
42 persons
120-ton bollard pull
AHTS
14.5 kn
120 ton
450 m²
Fi-Fi 1
400 ton
150 ton
2x 1 300 m x 68 mm
1x 1 800 m x 68 mm
42 persons
Performance
Capacity
Vuyk Engineering Rotterdam assisted Smit Engineering to compare the various
shipyards offers in technical and commercial way and made ship motion
calculations to advise for the correct configuration of main propulsion, bow and
stern thruster to obtain the DP-2 class notation.