Simonsen Workboat

Simonsen Workboat is designed for seismic work offshore, and modified to accommodate ROV and AUV handling.

About the company

Simonsen Workboat is established in Trondheim and has one boat located in Nyhavna on the NTNU jetty. Simonsen Workboat was started in Q1 2026 and is based on, and not limited to, experience from many years as technical manager for westplast workboats in a seismic, company 25 years experience in seismic, also being in charge of the training of coxswains and crew for seismic workboats like hull 137.

About the equipment

The workboat (hull 137) is manufactured by Westplast AS and originally designed for seismic work offshore. Modifications are done on the boat to accommodate ROV and AUV handling which also include more deck space and lighter boat. Pullforce 2,5 tonnes is maintained and speed has increased to 30 knots max. Hydraulic LS system (250 bar) on both engines

Use cases

Robust boat with unique fendering system all around the boat from pur-fender.
A-frame on the end of the back deck for safe deployment and recoveries, opening under A-frame is 124cm height and 128cm wide.
Very good for towing operations and is fitted with a certified towing bridle on the stern and a max tow force of 2500 Kg. Also fitted with a strong hydraulic winch on the bow with 220meters of 16mm spectron rope.
A strong SS cable lifter from undertune is fitted on the starboard side of the wheelhous to handle insea equipment like nodes or or big sonars, can handle 200Kg and goes down to 1,2meters under the surface.
Aft starboard side has a flipper for smaller equipment safely flipped in the sea by using the onboard hydraulic system.
Modifications can be done onboard to accommodate a project if all parts agree to the terms.

Technical key data

Two YANMAR Diesel engines (6LPA-STC) total 580 HP
Two Waterjets NAM, with bollard pull of 2,5 Tonnes and 1000Kg pull in reverse.
Dobble fuel tanks (2X250 Litres) , battery systems and backup filtering for safe journey.
Open back deck of 5 meter length and 2,5 - 2,8 meter with.
Small wheelhouse for 2 people and coxswain.
Heating inside the wheelhouse.
Hydraulic LS system (250 bar) on both engines but most winches are removed.
230V 800W available onboard
5G and WiFi communication, also linked to NTNU pages, more data will be available later.
Max speed 30 knots.
Certified for 11 persons but not recommended for more than 5 as seats are removed.

Practical key data

The vessel is rented out with crew.
Before any project, depending on the complexity of the planned operation, a SJA will be created to secure a safe and successful operation within expectations.

Safety requirements

Safety on board is a priority. Crew training may be required depending on the type of task and project. Common PPE will be used as required for any operation.

Contact information

For technical information and use of the Simonsen Workboat, please contact:
Vegard Saur, Phone: +47 958 58 674, E-mail: vegard@fi-nor.no