Jones Bros has used GPS technology to complete phase one of its work on a £36M Essex coastal defence project.
The North Wales-based infrastructure firm constructed the first eight rock groynes needed for the Clacton to Holland-on-Sea scheme.
The GPS system allowed plant operatives to accurately install the rock groynes in water up to 1.5M deep.
After a short break, the firm will begin work on the remaining 15 groynes in mid-March, aiming to complete in the autumn.
The scheme – for which Tendring District Council is client, and VBA is main contractor – is designed to protect more than 3,000 properties from sea erosion.