CorribCharts.com - FREE digital charts of Lough Corrib

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In the northern part of the Corrib, about 10% (or possibly less) of the bottom structure is rock - the rest is actually featureless mud

This shows the kind of amazing resolution that is possible with high frequency sonar. This is the water supply pipe into the corner of the pier at Lisloughrey supplying the pumping station

Interesting shot - these are BIG fish. This was in 60ft of water, but the shoal was off to port somewhere. You can see the sonar shadows of the individual fish on the bottom. We know the shadow is approx 45ft off to port (the unit works this out), and the apparent distance of the fish from their shadow is approx 50% of the distance of the transducer to the shadow aquick dooodle and they must be 30ft down and 23ft off to port. And BIG!

This appears to be the wreck of a barge near White Strand island. This is close to the route from the old mines in the upper lake to Oughterard / Galway so it’s very possible. The shallows around here are treacherous in a submerged Karst landscape

A 112ft deep hole completely missed by the admiralty survey, and full of fish. Notice the 2 vertical stacks of small fish, probably Roach or Perch on the high res sonar image. The small dots close by around them are more fish. On the traditional sonar image you can see both shoals again, and a large predator fish, either a trout or maybe a pike, near the top of the peak on the right hand side – at a depth of about 20ft. There was quite a lot of interference using this frequency

This is what looks like a bit of wreckage in the middle of the Needles Shallows (West of Cleenillaun). Its about 15ft long, rounded at one end and square at the other (Top right of sidescan image)

A lump discovered leaving Ashford, NE of marker 127

Tight but deep (15ft) channel between the shoreline and North of Conors Island. The spit extends out quite a bit North of the island which the sidescan clearly picked up