Abstract :
The following abstracts are from papers published in the October, 1964, issue of The Journal of the Institute of Navigation (London). Single copies of the Journal may be obtained for 20 shillings from John Murray (Publishers) Ltd., 50 Albemarle St., London W1, England. Membership inquiries may be addressed to the Institute of Navigation, The Royal Geographic Society, 1 Kensington Gore, London SW7, England.
