Isle of Grain Power Station Cooling Inlet 13 October 2023 /Posted byStephen Lainson / 0 Case Studies Using a 3D SONAR probe deployed into position on the outside of the cooling water inlet cage by a diver, we mapped the sediment build up inside the structure to enable effective and targeted dredging to be undertaken. Download PDF About the author: Stephen Lainson Stephen is the Managing Director of Fortis Remote Technology, a Mechanical Engineering business, in Cumbria.