Wrong-headed satellite precision claims

I’ve had quite a few emails recently from Orca, a navigation equipment and software firm, boasting about the 3 metre location accuracy of their equipment as a major selling point. It’s a waste of marketing effort, as far as I’m concerned.

Three metre satellite accuracy – available nowadays even on some top of the range phones – is no use when round much of the British Isles chart positions can be far less accurate.

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