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British Waterways use Portable Navigator

British Waterways Multi Channel Shallow Water Sounder

Specially adapted workboat with floating transducer booms

British Waterways, who manage the inland waterway system in the UK, have entered the hydrographic survey field. Specialising in shallow water surveying, canal, river and reservoir projects, BW can offer a unique service based on their experience of managing over 3000 km of inland waterways and navigation.Using the latest DGPS/swathe sounding survey techniques BW offers a very cost effective service and specialise in work on water areas usually considered unsuitable for traditional hydrographic survey. New survey systems have been developed in conjunction with Effective Solutions (ESL) of Romsey, UK.

Contour plot on GIS system showing dredging areas

BW also offers a full hydrographic modelling capability and a dredging/disposals consultancy based on their management experience of the canal system. Recent projects have also included consultancy work on the re-opening of the Krishnarpur Canal, Calcutta. and the Millennium Link in Scotland. Further information from Laurie Waterhouse, Hydrographic Surveyor, British Waterways

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ESL have recently produced a customised four channel data logging system using Portable Navigator and NMEA Pro for British Waterways. It enables swathe sounding of inland waterways and greatly speeds up the job of planning dredging operations.

A specially adapted work boat with four sounder transducers mounted on booms supported by floats is equipped with an accurate DGPS system. The operator drives the boat at 4 knots up and down the canal covering the required area.
A customised version of Portable Navigator logs the data and plots the swathe showing the boat and the booms on the chart. The logged data is later exported to a GIS package for display and analysis.
During logging Portable Navigator displays and logs the position of all the transducers, using the heading of the work boat and the sensor geometry. The optional Swathe Plot enables the helmsman to see the ground covered.

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