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    Re: Titanic's last stars
    From: David C
    Date: 2019 May 2, 03:30 -0700

    In 1946 British mariners were taught (among other things) meridian altitudes, ex-meridians, the longitude method and the intercept method. A quick glance through some speciman exam papers reveals that they were still being examined on the longitude method, which I take to be the time sight or long by chron method.

    My reference is Nicholls's Concise Guide Volume 1 1946.

    The Admiralty Manual of Navigation vol III  1938 mentions that there are two methods of obtaining a position line - the intercept method and the longitude method. It states that both methods are  compared and explained fully in chapter X!V of volune II. Unfortunately I do not have a copy of vol II. There is however a detailed disussion of the two methods in vol I of the 1928 edition.

    Time sights and the intercept method are both position line methods. I am suprised that there seems to be an impression that time sights are inferior to intercepts even though thery both provide the same information (I stand to be corrected).

       
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