This version of the Corrib Chart, the Corrib Fishing Map for Nuvi has a fully contoured upper lake - from Greenfields to Maam, with the remainder of the lake as 10ft and 5 ft shallows. It has marine routes, markers and soundings as well as island names etc. Just tap on an object and it will tell you what it is. There are all the holes and dropoffs, many of which are little known, as well as all the shallows.
It is based on the version prior to the introduction of the new marker system.

If you want your copy, simply go HERE

The Garmin Nuvi is a convenient GPS to run the fishing map on due to its slim pocket size, it can be loaded from Mapsource, or run the chart direct from micro SD card. Battery life is however quite limited on the Garmin Nuvi.

A deep hole near Carrickaslin - Inishmicatreer

Shallows near marker 114 - there are LOTS of them

Approaches to Oughterard

Hen Castle in the North Lake, and the deep hole under Lackavrea