Or how about a "Fields On Alert" tab on the clipboard? This would show every friendly field number with flashing radar. Kind of like a country-wide intelligence gathering. Not that much harder to scan the map though. Just a thought.
Thats a good idea. Let me suggest a synthesis...
One column of that list is "Time in Alert" and the list is sorted in ascending order.
By default when you click on that tab, the initial selection is on the top item (i.e. the most recently flashing).
You can then immediatly click on the "Defend" button on the "Fields on Alert" tab and get taken to the most recent field. Or you can select a different one first.
That way you get the best of both worlds. You can just accept the default selection and go "Instant Action" or pick another one instead.

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Wab