1, 000頓型漁業練習船に装備された音響測深機の作動に関する研究(日本航海学会第31回講演会)

概要

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The author measured the performances of the echo-sounders, each 14kc. and 200kc. in frequency of 2 sets and both frequencies of 1 set under sailing in shallow and deep sea waters. From these data it may be considered following results. 1) It may be supposed that the margin curve of the echo-sounders obtained in shallow waters cannot apply into the curve of deep waters. 2) The distance between echo-sounders and keel line is larger, more attenuations by propellering is increased. When the sets of echo-sounders installed in near middle sectons of the hull, one fitted from 1.25 meters from the keel line, another is 2.20 meters, the latter gives larger attenuation than the former by propellering and the attenuation-difference is about 20 db. 3) Clear differences were obtained on the relations between installed positions and relative wind direction in the performances of the echo-sounders.
公益社団法人日本航海学会の論文
1965-01-25