For developing a low − cost and simple receptiQn system of satellite _ broadcasting on board, an antenna tracking mechanism using a two −−axis rotator is desired . On board of the Training Ship ' ' Hokutomaru "
When goods are loaded on a ship , 』 it should be certified that the draft , the stability , the distribution of shearing force and bending moment are approved for the safety of ships . This computer was produced by way of trial in order that they 皿 ight be calculated rapid ユ y and exactly and this object was attained nearly
Asimple wave height meter is proposed using a simple microwave radar which has two detec ・ tors separated え ε / 8 (λ g ; microwave wavelength in waveguide) from each other inside the same wave ・ guide where a Gunn oscillator is placed . Afield test is carried out at off − Tateyama by placing the doppler radar at the bow of the ship ,5meters above the see leve1 , The result agrees reasonably with that obtained simultaneously
工 nAutumn 1980 , we formed a plan ' fQr the Comprehensive Training System of all kinds of the 皿 ethods of signalIing stated in the Iaternational Code of Signals, including the domestic method of signal − ling and radiotelephony . In order to improve efficiency of the training, and also to rneet the requirements of the International Convention on Standards of Training, Certification and Watchkeeping for Seafarers, 1978 , we have been c 沚 rying out the plan successively since the b6ginning of 1981 with the limited budget apPrQpliatbd , The system is composed of : 1 . Atttomatic transmitting device operated by a persQnal _ cQmputer for the reception 亡 raining in the three kinds of signalling by hand_ flags inc] uding the domestic method 2 . Automatlc tTansmitting device operated by the personal . . computer or a tape recorder for the reception training ・ f the M ・ rse C ・ de 3. Converter , changing flashing 工 ight to sound , by which the quality of the Morse Code transmitted by asigna ] ling searchlight can be examined 4 . Video component system 5 ・ Color display operated by the personal −conlputer for the flag Si . gnalling 6 . VHF radiotelephone simulation sys 亡 em consisting of thirty stations for students , Qne main station and two sub −main stations used by instructors Using those devices , we made a series of experiments on our first _ year students during the second term in 1981−1982 and the fo ! lowing sedond term in 1982−1983, and obtained good results . 1. 概 要
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