How to Map AUKUS?

There has been lots of news in the last week about the new trilateral security partnership, AUKUS. But how do we visualize this relationship among three partners in very different corners of the globe. A standard world map--whether Mercator, Miller or a good compromise projection like Robinson--seems inadequate. The announcement explicitly invokes the identity of "maritime democracies," so any visualization should have a maritime flavor. I imagine that there might be several interesting ways to do this. But here is a first sketch, based loosely on similar ideas I was exploring in my "quad" map. With bathymetry, because submarines...