Did you know - that the AODN Portal base map (base layer) can be changed? In navigating to Step 2 of the AODN Portal the default base layer is Bathymetry Baselayer. A recent inclusion on the AODN Portal is the Marine Parks Boundaries.
To add or change base layers, navigate to Step 2 of the AODN Portal, select the small '+' on the top right hand of the map to expand the base layer option box. Use the radio buttons to add or remove map layers.