Colberjs
Member
I am not familiar with the ocean basemap in the prior version. But in the current release if you go to Map Layers>Nationwide Layers>Water (scroll to bottom of nationwide layers sheet) there is an option for Nautical Charts that'll give you some info.
Just for the record, I am in no way affiliated with onXmaps - I am just an obsessive and self-guided tester/user. I am paying close attention to the onX threads on this and other forums because I am concerned about some of the functionality in the current release and am tracking issues and their response closely. I am chiming in here to simply give a hand when I can as I assume onX personnel have their hands full at present.
I'll try to get you a photo of the old ocean base map. I didn't upgrade my old iPad so I could still view it.