The Nuvi is not a marine unit, it is designed for automotive use but is a big favourite amongst fishermen - so in 2010 I created a "Nuvi optimized" version of the chart.
This has now been updated , and has a lot more detail, new survey data from areas unsurveyed in 2010, as well as being fully contoured. It is perfect for fishing.
The Nuvi version for fishing lacks a lot of the functionality of the marine version - but does help with situational awareness. All shallows, deeps and dropoffs appear on the Nuvi version - but certain objects may not appear - depending on model.
As with the Garmin G2 chart, I am the sole author of all versions of the chart (no matter where you got it), so would recommend you stay updated with the latest releases - only available on this website.
Version 3.1 of the Corrib Chart for NUVI is NOW AVAILABLE
Get the LATEST GPS Chart here