I think we're on the same page - As with all our instruments, some would use it others not. And I also don't see this as a replacement for a split-screen option.
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And the "new" map could be rectangular instead of round. Easier to program I would guess. On a 4 inch (cellphone) screen it is probably not practical,to show the additional map but on a 7 or 10 inch tablet, plernty of visual real estate.