E.ON has started survey work along the proposed onshore cable route from Brooklands Pleasure Park to the proposed substation site in Twineham.
This will allow E.ON to plan construction of the route in more detail, whilst refining the width of the cable route.
The work will also provide information on the ground conditions, such as depths of soil, and identify archaeologically sensitive areas.
This data will be used to determine the best materials and construction methods, when the cable are laid.
The wind farm off the coast of Newhaven could have up to 175 turbines and enough electricity to supply around 450,000 homes. It would also create jobs.
A final decision on whether consent for the wind farm will be granted will be made in summer 2014.