Sea bed maps

Hi,
Just wondering what maps or Apps people use when searching out reefs or features in areas? trying to do some desk based surveys over the winter months--cheers?

For desktop browsing https://maps.marine.ie/infomarbathymetry/ and https://webapp.navionics.com/#boating@6&key=%7B%7Cr%7BHfxyr%40

Navionics app has relief shading which includes the Infomar survey data.

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