FEATURE SPONSOR FEATURE SPONSOR
GANGWAY & ACCESS SYSTEMS
FUTURE DEMAND ON GANGWAY CAPABILITIES
years to transfer large numbers (300+) of personnel on and off single structures every day, primarily to transfer personnel between their accommodation vessel and the production facility, with the gangway effectively remaining connected for the whole day. In an offshore windfarm one must consider the frequency of transfers required and the number of structures visited. On a project such as the Amrumbank West which consists of 80 wind turbines; safety, speed and efficiency of transfer is key. In one 24 hour period, the Siem Moxie undertook 51 dockings transferring 154 personnel, and that in significant wave heights of over 2.5 metres and high wind speeds. The choice of gangway impacts
efficiency and speed. Whereas the Siem Moxie has a permanently built-in Uptime
International gangway, which allows an unlimited number of personnel to transfer as long as a safe connection is made, both the Siem Marlin and the Siem Garnet examples used Ampelmann gangways, which have a cap on the number of personnel, who could transfer at each connection. Also as the vessels were originally not specifically designed around W2W services, the total number of transfers per day is lower and depending on the model/type the weather capabilities are reduced. However you have the flexibility of being able to move or remove the gangway once you have completed the respective W2W project.
Future projects are putting even more demand on gangway capabilities. Numerous gangway manufacturers have developed gangways, which can also be used for cargo transfers with varying load capabilities – therewith being able to make a W2W vessel without a suitable crane even more versatile. The growth of the market segment has given rise to continued interest with organisations such as DNV GL and Bureau Veritas developing certifications specifically for gangways, and the International Marine Contractors Association setting up a dedicated renewables W2W subgroup. This market is growing, and Siem
Offshore Contractors is currently in the process of mobilising additional vessels with a variety of W2W gangway solutions for a broad range of project requirements, drawing from an in-group fleet of 53 vessels.
SCAN/CLICK
Alex Gauntt Siem Offshore Contractors GmbH
MORE INFO
www.windenergynetwork.co.uk
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