Menu

We have a huge amount of knowledge and experience

The N-O-S fleet is versatile

The fleet is divided into categories based on model and capacity.

We have designed, developed and specified most of the vessels in our fleet ourselves. We have a huge amount of knowledge and experience within the company when it comes to vessel construction and reconstruction. We know what it takes to run a vessel in the best, most efficient way possible when it comes to environmental adaptation, performance and comfort. Many of our sailors have spent a large portion of their lives at sea and have significant experience of operating a vessel and of what can happen at sea. Continually developing our vessel types and meeting the industry’s needs is a matter of course for us. We are constantly striving to find optimum vessel solutions that benefit our personnel, our customers and the environment.

The N-O-S fleet is versatile, and its vessels are of a high standard and developed with flexibility in mind. The fleet is divided into categories based on model and capacity. The aim is to offer the customer as much choice and diversity as possible when it comes to vessel types. We always make every effort to tailor solutions to our customer’s needs in order to ensure that the work is as efficient as possible.
The fact that we are able to combine vessel categories that complement each other means that we can find the right solution in every circumstance. We are also able to quickly transition from one project to another, as the vessels are fully utilized.

A-E & M class

State of the art crew transfer vessels

A-class

The A-class vessels are a series of CTV vessels designed by us, the hull shape of which offers excellent stability, meaning that they can withstand tough challenges in rough weather conditions. Their construction also facilitates maintenance, ensuring that the vessels remain in perfect condition. Two 8V MTU main engines and ’Controllable Pitch Propulsion’ make the A-class vessels reliable, robust and fuel-efficient.

For maximum flexibility, the vessels have been constructed with a load friendly surface measuring over 50 m2, a load capacity of 15 tonnes and crane access. The vessels are equipped with a fuel transfer system and pressure washer access in order to be able to offer clients more services and the chance to utilize the full capacity of the vessels. The majority of the vessels are equipped with satellite communication systems. There is room for two crew members to stay over on board, meaning that the vessel is constantly staffed.

Comfort is in focus on board the A-class vessels. There is room for hanging outerwear and equipment in the entrance. Having safely boarded the vessel, all passengers will travel in comfort in the large lounge, which is equipped with 12 comfortable sprung seats. Large windows allow passengers to enjoy the views, which helps prevent seasickness. The lounge features an entertainment system and a small galley stocked with coffee and other drinks. To further ensure passenger comfort, the lounge is also furnished with a sofa and table.

The Fleet
high-speed crew transfer vessels

B-Class

There are seven B-class vessels in total. Due to their unique construction, these vessels are capable of travelling at higher speeds whilst consuming less fuel than similar vessels. Their construction also facilitates maintenance, ensuring that the vessels remain in perfect condition. For maximum flexibility, the vessels have been constructed with a load-friendly surface measuring over 50 m2, a load capacity of 8 tonnes and crane access. The vessels are equipped with a fuel transfer system and pressure washer access in order to be able to offer clients more services and the chance to utilize the full capacity of the vessels.

The majority of the vessels are equipped with satellite communication systems. The vessels have extra spacious storage areas and space to hang outerwear and equipment. The B-class vessels offer a high degree of comfort and are very popular thanks to their interiors featuring large tables and comfortable seats. Having safely boarded the vessel, all passengers will travel in comfort in the large lounge, which is equipped with 12 comfortable seats. Large windows allow passengers to enjoy the views, which helps prevent seasickness. The lounge features an entertainment system and a small galley stocked with coffee and other drinks. To further ensure passenger comfort, the lounge is also furnished with a sofa and table.

The Fleet
Fast and reliable crew transfer vessels

C-Class

C-class is a series of CTV vessels, with a hull shape of which ensures stability and performance of up to 2m Hs thanks to the N-O-S-designed fender. Large fuel tanks ensure that the vessels have the capacity to remain in continuous operation for up to one week, which in turn ensures efficiency. Their construction also facilitates maintenance. For maximum flexibility, the vessels have been constructed with a load-friendly surface measuring over 90 m2, a load capacity of 15 tonnes and crane access. The vessels are equipped with a fuel transfer system and pressure washer access in order to be able to offer clients more services and the chance to utilize the full capacity of the vessels.

The majority of the vessels are equipped with satellite communication systems. There is room for up to four crew members to stay over onboard. Comfort is in focus onboard the C-class vessels. There is room for hanging outerwear and equipment in the entrance. Having safely boarded the vessel, all passengers will travel in comfort in the large lounge, which is equipped with 12 comfortable sprung seats. Large windows allow passengers to enjoy the views, which helps prevent seasickness. The lounge features an entertainment system and a small galley stocked with coffee and other drinks.

The Fleet
Next generation crew transfer vessels

D-Class

Our D-class vessels have been designed by us to withstand the toughest of weather conditions and the most intense challenges. The D-class vessels are ultra-modern and highly sought after. Large fuel tanks and water makers ensure that the vessels have the capacity to remain in continuous operation for up to two weeks, which in turn ensures efficiency. The N-O-S-designed fender makes the D-class vessels unbeatable. The shape of the vessel hulls makes them exceptionally stable and ensures that they are capable of top-level performance and up to 2m Hs.

Their construction also facilitates maintenance, ensuring that the vessels remain in perfect condition. For maximum flexibility, the vessels have been constructed with a load-friendly surface measuring 90 m2, a load capacity of 20 tonnes and crane access. The vessels are equipped with a fuel transfer system and a pressure washer in order to be able to offer clients more services and the chance to utilize the full capacity of the vessels. The vessels are equipped with satellite communication systems. There is room for five crew members to stay over onboard, meaning that the vessel is constantly staffed.

Comfort is in focus onboard the D-class vessels. There is room for hanging outerwear and equipment in the entrance. Having safely boarded the vessel, all passengers will travel in comfort in the large lounge, which is equipped with 12/24 comfortable sprung seats. Some of the vessels also feature business class seats. Large windows allow passengers to enjoy the views, which helps prevent seasickness. The lounge features an entertainment system and a small galley stocked with coffee and other drinks. To further ensure passenger comfort, the lounge is also furnished with a sofa and table.

The Fleet
Future generation crew transfer vessel

E-Class

Through extensive research, experience and the motivation to always provide the safest, most reliable and efficient solutions, Northern Offshore Services is proud to present the new E-CLASS series. The E-CLASS will combine the proven design of the D-Class series with the new HYBRID technology that N-O-S has developed. This vessel series has been brought forward to exceed the requirements of the industry. With its 34x11 meters it is one of the largest vessels in its category.

The E-CLASS series are Hybrid equipped. This means that the E-Class’ main engines and generators are combined with batteries to ensure optimized propulsion. The batteries let the engines work at its optimum, taking care of the its peak demands and recharges at low, also known as “peak-shaving”.

The batteries can be recharged from shore, during vessel operation and it is prepared for charging the batteries directly from the wind turbine. Thus, utilize clean renewable energy directly from production to the E-Class.

The E-Class series will feature the proven and thoroughly tested 4-engine concept. As experienced with Northern Offshore Services other vessels, this engine concept has proven itself with the highest on-hire statistics, offering maximum reliability to our customers.

The Fleet
High speed offshore support vessels

M-Class

The M-Class series are 27 M high speed offshore support vessels, equipped with waterjets. The 2 x MAN engines combined with the Hamilton waterjets enables the M-Class with a speed of 27 knots. The vessels provide air suspended seats, including seatbelts and headrests for maximum safety for the passenger. All seats feature power sockets and there is high speed Wi-Fi available onboard. The accommodation and bridge are fully air conditioned with all decks fitted with noise-deadening materials to reduce noise levels for a comfortable transfer environment. Crew accommodation onboard is available for 6 crew members.

The M-series is equipped with the NOS Fender. The functionality of this fender as proven to be very efficient, resulting in both softer landings and a safer transfer of technicians while the requirement on the push power has been reduced.

A 400V AC power supply is available for use on board to power contractor’s equipment and machinery. The front work deck features a crane which is suitable for the loading of equipment in port. Additionally, a High Pressure Washer is fitted for use at the bow for TP cleaning duties.

The Fleet
Offering maximum reliability to our customers

T-Class

T-Class is an updated/recycled version of the A-Class series. The updates include lengthening to 25,35 m and upgrade to 24 PAX. With the new length comes an additional forward and aft deck space, 70m2 in the front and 30 in the aft. The vessel will now be able to carry 20 tonnes in total. N-O-S is also upgrading the propulsion system. The T-Class will feature the proven and thoroughly tested 4-engine concept (Volvo Penta IPS). As experienced with Northern Offshore Services other vessels, this engine concept has proven itself with the highest on-hire statistics, offering maximum reliability to our customers.

The T-Class is also prepared to be converted into hybrid. The hybrid solution means batteries, engines and generators works in collaboration to provide energy to the vessel. Thus, enabling large fuel saving possibilities. The vessels will be equipped with N-O-S fender, which is thoroughly tested on many of our other vessels in our fleet.

The Fleet

Multipurpose vessels & Southboats

Agility, quality and high performance

Southboats

Some of the vessels are equipped with fuel transfer systems and a pressure washer in order to be able to offer clients more services and the chance to utilise the full capacity of the vessels. Water jets and IPS systems offer exceptional maneuverability
- Water jets – optimum operation in shallow waters.
- IPS – low fuel consumption, excellent performance in relation to size and consistent speed even when carrying heavy loads.

The vessels are equipped with satellite communication systems. The vessels range in size from 15 to 18 metres. Having safely boarded the vessel, all passengers will travel in comfort in the lounge, which is equipped with 12 comfortable sprung seats. Large windows allow passengers to enjoy the views, which helps prevent seasickness. The lounge features an entertainment system and a small galley stocked with coffee and other drinks.

The Fleet
Special operations or custom requests

Multipurpose vessles


Supplier – Specially designed for the transport of goods, crane work, anchor handling and personnel transport.

Preceder – Designed and used for icebreaking in ports and at offshore wind farms.

Rescuer – Ambulance vessel specially adapted for ambulance care, with treatment spaces and an ambulance vehicle on board.

Tender - Used for personnel transport and smaller goods shipments.

Northern Skagerrak – Used for transporting fuel, slop and sludge in connection with projects in port or offshore.

Northern Kattegat - Used for transporting fuel, slop and sludge in connection with projects in port or offshore.

Server - Designed for towing, goods transport, crane work, anchor handling and personnel transport.

The Fleet
Designed for optimized accessibility

Ørsted vessels

Together, Northern Offshore Services and Ørsted operate six specially constructed CTVs at the Anholt, Nysted and Horns Rev 2 offshore wind farms. These vessels have been especially constructed to optimize turbines’ accessibility in different sea areas.

Please see the vessel specifications for further details on each individual vessel.

The Fleet