Geodesea Ltd has recently been contracted by the PLA to acquire, process and render high resolution surveys of the numerous tunnel crossings under the River Thames for Transport for London & London Underground.
POSMV INS and Reson MBES survey data was acquired using Hypack/Hysweep and processed using Hypack/Hysweep & Fledermaus software.
These surveys assist in the ongoing monitoring for scour and accretion of the river bed in the vicinity of the tunnels.