• Increase in personnel safety during turbine access• Simultaneous increase in accessibility• Employment of small and middle vessels • Compact and easy building method of the system• max. weight of the system approx. 4 tons • Use of proven technology

- High security for the personnel- High reliability- Reduced transfer costs

The first offshore wind park experiences shows that the availability depends strongly on the accessibility. The access depends considerably on the wave heights. A safe Boatlanding is usually no longer possible for significant wave heights of 1,5 - 2.0 meters above. Apart from the ability to access also with large wave heights the economy of the assigned system is crucial factor for the selection of the system. This depends considerably on the necessary investments, the possible additional load of the vehicle, the travel times as well as the operating cost such as personnel expenditure, fuel consumption and maintenance cost. These factors depend considerably on the design of assigned service vessels.

Momac developed two offshore access systems, MOTS – a ship mounted active system, and SLILAD – the turbine mounted a passive system.

First function tests were locked successfully. A promotion as well as a prototype from MOTS is in manufacturing, the necessary security concepts are in the test and permission phase.Momac is looking for a pilot for testing MOTS and SLILAD.

For further information contact Stefan Leske at the conference.

AbstractAbstract

Momac-Offshore-Access-SystemsMOTS & SLILAD, improve the safety of turbine personnel transfer

momac GmbH & Co. KG, Germany

PO 208PO 208

ResultsResults

ObjectivesObjectives

Direct contact to momacat the conference

Phone: +49 172 989 0 717

Direct contact to momacat the conference

Phone: +49 172 989 0 717

MOTS (Momac-Offshore-Access-System)MOTS (Momac-Offshore-Access-System)

European Offshore Wind 2009 Conference & Exhibition, 14 – 16 September, Stockholm, Sweden European Offshore Wind 2009 Conference & Exhibition, 14 – 16 September, Stockholm, Sweden

MOTS: Active System I Ship Mounted• Self-stabilizing system that provides safe access to offshore structures

by actively compensating for the motions of the vessel• Combination of proven robotics technology and real time motion

measurement equipment• Installation possible in small and fast vessels without Dynamic

Positioning (DP)• Can be used on existing boatlandings without modification• Safe system, even in case of power breakdown or other failures• Low-maintenance and seaworthy construction

SLILAD: Passive System I Turbine mounted• Increases the security of boadlanding with small vessels• No relative movement vessel to ladder and ladder to platform• SLILAD compensates for the vertical movement of the vessel through a

locked connection element• Prior stepping on the SLILAD the ladder is fixed to the vessel, after

stepping on the SLILAD the ladder becomes fixed to the platform• Automatic tide level adjustment, thereby no mussels or other vegetation

on the used part of the ladder• Simple and seaworthy construction

Movement compensation: no limitsElectrical connection: none

SLILAD (Sliding Ladder)SLILAD (Sliding Ladder)

Movement compensation: 6 degrees of freedom max 3.200 mm vertical + dumping of the

vesselSystem weight: app. 3.400 kgElectrical connections: 3-Phase 400VAC, 14 kVA

The compact design of the robot-based MOTS makes - an installation possible even on fast service catamarans, whereby- the accessibility to the wind-turbine can be substantially increased and - the journey times can be kept as short as possible