I've now added the grid as well as re-adjusted the type size for the sea names. I've also started to add on some of the locations. It's quite interesting actually when seeing visually the locations of the divesites, although there are only 2 types of dive on there at the moment there seems to be quite an interesting relationship.

A lot of the locations are small islands which I didn't initially include, but also the size of the icon covers it up anyway so these are some of the things I'm having to address now I'm putting the design together. This seems to be the point at which the problems in the design are arising and I'm having to work out the best solution.