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Volume 12 - April 1959

Contents

Page 3 of 4

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  • The McIntosh Parallel Ruler

  • Brett Hilder
  • Published online by Cambridge University Press:
    18 January 2010, pp. 98-99
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  • A new type of parallel ruler on rollers, devised and patented by Mr. Ian A. McIntosh of Sydney, deserves the attention of marine navigators. The new ruler is apparently similar to the brass-roller type used in the Navy, but it has the great advantage of omni-directional mobility. It also has much easier manœuvrability than the parallel rules used in the Merchant Service, known as Captain Field's or the ‘walk-about’ type.

  • The Brest—Canaries Race

  • Mario Bini
  • Published online by Cambridge University Press:
    18 January 2010, pp. 99-100
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  • In the Brest to Las Palmas de Gran Canaria race held last August by the Sail Training Association I was skipper and navigator of the 7-ton yawl Artica II of the Italian Navy (which incidentally obtained the best corrected time of all three classes). From the navigational point of view the race offered no particular difficulty because although long—1400 miles—we were on a reach most of the time, a condition that makes the navigator's job much easier. It might in any case be interesting to those who are keen on ocean racing, to hear about some of the dodges (certainly not new to them) used on board Artica II:

    (a) A gnomon pin (about two inches long) had been welded in the centre of the compass rose: when the Sun was low and the boat sufficiently steady the shadow of this needle enabled us to have very good compass checks.

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  • The Beaufort Scale

  • E. L. Delmar-Morgan
  • Published online by Cambridge University Press:
    18 January 2010, pp. 100-102
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  • I was particularly interested in Commander C. E. N. Frankcom's note on the Beaufort wind scale at the end of the article by the Hydrographer of the Navy on Admiral Sir Francis Beaufort (this Journal, 11, 266).

    Commander Frankcom states that from time to time attempts have been made to abandon the Beaufort scale and adopt some other form of scale but that efforts to do this have failed. Efforts to improve on or change the form of the Beaufort scale are, in my opinion, likely to continue to fail for the very good reason that the existing scale is almost flawless mathematically.

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Letter to the Editor

  • Letter to the Editor

  • Published online by Cambridge University Press:
    18 January 2010, p. 340
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Index

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Page 3 of 4