方向探知機の実用誤差(日本航海学会第17回講演会)

抄録

As well known, the direction finder has various kinds of error, that is to say, they are instrument's error, quadrantal error and errors which are influenced by natural features or astronomical phenomenon. The instrument's and quadrantal error mean stable error. Instrument's error can be artificially removed and quadrantal error can be corrected by applying the correction curve. The another errors are unstable, because they show the variety with the variation of geographical and astronomical conditions, accordingly, We are very suffered in the case of dealing with these errors. When Shinyo-Maru, training boat in our university, has sailed in the adjacent sea region of Japan during from october to november in 1955 and 1956, We observed the direction finder's errors in various conditions, and clarified these errors into parts caused by distance, daytime, night, twilight, and natural features. From these treatments, We calculated the standard and probable errors in each parts.