SeaRenergy has successfully accomplished the installation of the HelWin alpha subsea structure and cat tower.
The subsea structure of HelWin alpha consists of a template with a weight of 1,000 tons and six piles. After piling the template was removed.
The stand alone cable access tower is positioned alongside and secured with four piles.
For the piling, the cofferdam technology had been chosen to reduce the water borne noise. Besides the great advantages in regard to noise mitigation this technology enabled us to deploy a pile guidance system which was included in the unit.
SeaRenergy developed the installation concept including positioning method for template and cat tower. In addition, SeaRenergy was responsible for the execution of the offshore operations.