The majority of the attached was mapped at a speed between 50 - 55 km/h SOG to create a base map for a river system that is approximately 35 km long.
It needs some tidy up, there is a 2 hour tidal difference between the mouth and the barrage where the "ramp" is. Obviously this is not going to pick up a lot of detail. Areas where I might want more detail I will spend more time trolling over to make detailed maps. However the river is in flood at the moment so the tides are all over the place. The main purpose of making he map is so that when I run down the river at night I have a guide on the chart plotter. Any serious mapping would need to be undertaken when the river levels have normalised again.
Dan