Upgrade & Retrofit

An upgrade increases system lifetime and improves operational efficiency, reliability and safety

Optimisation of your system reduces energy consumption, you achieve reduced emissions and gain reduced operational cost

Upgrade boosts your vessel's performance

Depending on the age and condition of the equipment, an upgrade or retrofit is an affordable way to extend the life of your system and potentially boost performance for greater productivity.

Your Brunvoll propellers, gearboxes and thrusters are durable structures, built to last.

When a system is well serviced, its life can easily be extended for the lifetime of the vessel.

Whether you’re looking for an upgrade to meet different running conditions or implement a more comprehensive retrofit, our engineers can help you identify the best options to optimise your vessel.

Optimise your vessel for a new operation profile

During the lifetime of a vessel the operation profile may be changed. New tasks and purposes, change of ownership, or new technology with changes in class requirements may cause need for an upgrade/retrofit in order to optimise the vessel's efficiency.

There are several ways to achieve increased efficiency. Our experienced engineering teams may assist you in finding the best solution;

  • We offer analysis of the energy consumption of different system configurations, and advise further actions to achieve the vessel’s optimum performance
  • Improve your vessel's efficiency by evaluating the propeller design
  • Reduce energy consumption and emissions by rebuilding the gearbox arrangement to a hybrid system with PTO/PTI unit
  • Increase safety and user-interface with an upgraded control system
  • Increase bollard pull
  • Change of classification society notation

The amazing Atlas Cove Story

An investment that paid for itself in less than 3 years


Told by Peter Stevens, General Manager, Southern Deep Sea Fisheries

Austral Fisheries, Western Australia

December 2020


This is a great story with a project that involved Austral Fisheries & Brunvoll in looking at reducing Fuel Consumption & Carbon offset costs on the fishing Vessel Atlas Cove (ex Osterbris out of Bergen Norway).

The work program involved changing to a bespoke Brunvoll Multi Step Gearbox along with a reduction in the Main Engine Horsepower & Variable Frequency PTO off the stern of the Gearbox with an expectation of fuel savings between 19 – 22%.

There was quite a considerable amount of work required but she sailed on time and without incident for a 100-day trip to the remote sub-Antarctic waters of Heard Island. 
It took about 6 months for the captains to come to understand and really extract the full value of the new drive train to achieve what ended up being operational and fuel efficiency gains that could only be described as ‘amazing’.

In 2019, the Atlas Cove achieved a 37% fuel saving compared to its pre-refit consumption figures.

This compares very closely with 2018 (38%).

In real numbers this is 1,185,887 L of fuel, and 3666t CO2-e emissions saved in 2019.

At 85c/L for fuel, this is a $1,008,000 saving.

As well asa ~$44,000 saving worth of carbon offsets.

Some good news from 2020, with a slightly different mix of fishing, the Atlas Cove saved a whopping 45% on fuel usage compared to its pre-refit consumption. This equates to 994,000 L fuel saved, and 3069t CO2-e emissions.

 At 78c/L this is a $775,000 saving, plus an additional $32,000 worth of carbon offset savings.

 Note that this investment has paid for itself in less than 3 yrs.


This gearbox is the gift that keeps on giving!

Make your thruster fit for the actual operation

  • Upgrade your thruster for EAL (Environmental Acceptable Lubricants). Our unique split solution approved by VGP 2013, allows for a small amount of EAL in the outer barrier, while the drive line components are lubricated by mineral oil.
  • Implementing variable pitch and rpm by upgrading to combinator mode, reduces energy consumption and wear & tear of the machinery.
  • Upgrade the equipment to meet a new class notation
  • Upgrade of power and control system to a true redundancy, typically required for DP notations.
  • Re-blading for increased efficiency and comfort.

Increase efficiency and avoid downtime by upgrading your control system

It's a fact that electrical parts and the system's software evolve quickly, and become obsolete after several years of good operation.

Upgrade to new technology increases safety, efficiency and durability.
  • Efficient operation with an updated control system
  • Increase safety with new electric components
  • Efficient trouble shooting enhanced by system log functionality
  • Spare part availabiliy
  • Online support from our in-house expertise

An upgrade may consist of a new control system, new functionality with DP, Joystick and autocrossing.

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Brunvoll RDT-Thruster is ideal for vessels with high demands for comfort, or operate substantial time in DP-mode

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Bjørn Svendsen

Bjørn Svendsen

VP Sales & Marketing, Brunvoll Mar-El AS

+47 959 64 155
Are Mork

Are Mork

VP Service, Brunvoll Volda AS

+47 906 80 054
Jim Varmedal

Jim Varmedal

Sales Manager Retrofit, Brunvoll AS

+47 905 11 503
Karim Alexander Longva

Karim Alexander Longva

Sales Manager Retrofit, Brunvoll Volda AS

+47 979 86 830
Mads Egseth Melbø

Mads Egseth Melbø

Sales Manager Service, Brunvoll Volda AS

+47 971 95 808

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