[time-nuts] LORAN C shutdown

[Poul-Henning Kamp]

In message <2455.41.130.184.218.1257890017.squirrel at webmail.lysator.liu.se>, bg
@lysator.liu.se writes:

>High performance mechanical rotating gyros are associated with platform
>systems. Ring laser gyros and fiber optic gyros are typically strapdown,
>which completely dominate modern navigation.

Actually, they are usually strapped down to a deliberately moving
platform to avoid mode-lock-in at the mirrors, which produces a
"sticky" or "discrete steps" effect at slow rates of rotation.

But that is a minor detail.

Poul-Henning

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