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Weighing in late on the Loran issue here. Been working on the boat.
Fact is, there are an awful lot of commercial fishermen still using Loran.
Also, I believe most professional navigators would tell you its an important backup for coastal navigation. Sextants, while valuable offshore, are just not much good for coastal navigation.
Consider too, for the paranoid types, the Chinese are playing around with shooting down satellites. Not to mention, the US Gov can very easily encode or shut down gps signals in times of emergency.
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