I gotta ask...why is Pearl Harbor not a port, but Hilo is? It probably won't matter much to range counts, but wouldn't Pearl be the West Pacific supply base? (And isn't it weird to have the only hex on the map that overstacks BBs isn't a port?)
This is an omission in the rules. Rule 2.4.2 should clarify that a Strategic Base Hex (19.4) functions as a Port (and a City) for all purposes. Under that rule, Pearl Harbor is a port. The rules sort of imply this but did not state it clearly. Thanks for noticing this!