Workability

An annual weather uptime of at least 87,5% can be expected

The Walk to Work vessel is designed and optimised for efficient offshore operations. The unique combination of the vessels design and functions, such as the motion compensated tranfer system and Voith Schneider Propulsion system, makes the Walk to Work vessel unmatched in efficiency year round. An annual weather uptime of at least 87,5% can be expected from this design.

Additional offshore weather uptime

Equipped with a motion compensated Barge Master gangway system and Voith Schneider propellers, this Walk to Work vessel is guaranteed to have 9,5% greater workability than standard SOVs, which have an average uptime of 78%. In waves up to 2,5 metres an annual offshore weather uptime of minimum 320 days can be expected from this design.

This additional offshore weather uptime, makes the Walk to Walk vessel a better option than standard SOVs, crew tranfer vessels or even helicopter transfers to offshore locations. 


Voith Schneider Propellers

Voith Schneider Propellers (VSP) enable stepless and extremely fast control of thrust in terms of magnitude and direction. The VSP enhances the dynamic footprint of the vessel resulting in more accurate and effi­cient dynamic positioning under all environmental conditions. Additional advantages are roll stabilisation of the vessel and fuel savings up to 17,5%. The speed of this type of propulsion and resulting DP footprint enlarges the workability of the vessel in comparison with traditional Azimuth thrusters with 9,5%: extra 34,5 days each year!

 

The figures below are based on dynamic DP simulations by DNV GL carried out with environmental conditions and wave spectrum according to the North Sea

(White: VSP / Red: Azimuth).



Failure recovery time

VSP ensures less excursion and fastest recovery in DP position during failures!

DP footprint

The speed of the VSP results in an improved and more steady DP footprint of the vessel.

Fuel efficiency

VSP need less installed engine power, thus less fuel consumption.


Watch the Voith Schneider Propulsion system in action


Motion Compensated Transfer system

The transfer system is selected as the best suitable ‘walk-to-work system’, in terms of operation speed of the system, simplicity of operation, power consumption and HSEQ, to transfer technicians and cargo safely from the vessel to offshore wind turbine and offshore platforms in waves up to 3,0 metres and wind speed up to 20 m/s (38,8 knots).

 

The gangway is mounted on an adjustable pedestal, which allows technicians to enter the gangway continuously from several decks on the vessel and enable a horizontal ‘walk-to-work’.

 

This operational flexibility results in a high workability of at least 87,5% in waves up to 3 meters. 


Wave height

Signicant wave height: Hs = 3,0 metres Next ›

Footprint

Small footprint of Ø 1.5 metres Next ›

Weight

Weight gangway: 22 tonnes Next ›

Adjustable pestal

Height adjustable pedestal: 3.0 to 5.5 metres Next ›

Power consumption

Low power consumption of 200 kW Next ›

Operator

Comfortable operator interface Next ›

Cargo

Cargo function: tip (1.000 kg) and trolley (500 kg) Next ›

Length gangway

Operational length: 19 metres Width: 0,9 metres Next ›

Lift capacity

Liting capacity integrated motion compensated winch: 1.000 kg Next ›

Continuous transfer

Continuous access of personnel and cargo Next ›

Wind speed

Design wind speed: 20 m/s (38,8 kn.) Next ›


 

Other design principles



Comfort

The Walk to Work vessel is developed for technicians who are not used to sailing. A proven hull shape, special propulsion system and comfortable facilities on board result in a high welfare standard.

Stepless approach

The layout of the vessel has been completely adapted to the workflow of technicians and cargo. An unimpeded flow  guarantees safe movements of materials and personnel.

Safety & sustainability

The Walk to Work vessel is developed for safe and sustainable offshore operations using multiple motion compensated elements and autonomous crafts.