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    Re: Discussion of subs/INS
    From: Frank Reed
    Date: 2012 Apr 12, 22:00 -0700

    By the way, in that same Mackenzie book "Inventing Accuracy" on page 142, the type 11 periscope and its use for resetting the INS errors is described (in quotations from submariners) as a "real dog", and they were "only too happy to get rid of it". It lasted less than a decade on US subs. That section confirms that French missile subs still had star-sighting periscopes in the 1990s.

    -FER
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