@article{oai:nagasaki-u.repo.nii.ac.jp:00009899,
 author = {合田, 政次 and 高木, 保昌 and 中根, 重勝 and 久野, 俊行 and 吉村, 浩},
 journal = {長崎大学水産学部研究報告, Bulletin of the Faculty of Fisheries, Nagasaki University},
 month = {Feb},
 note = {In astro-calculation, it is effective and necessary for the education and instruction for students to make clear the steps of the many errors and their contents. The data is the same as in a previous paper. We subdivided the calculation into 22 steps, and checked on the percentage of error and its contents in detail. As a result, the percentage of error of plural steps in one astro-calculation decreased accordingly as cadets were promoted to higher classes. The highest average of the error is shown in azimuth calculation. The error of steps in which they use the Altitude and Azimuth Tables decreased with the promotion of school year and according to progress in mastering astro-calculation. But we were surprised that they made many errors in subtraction, especially in azimuth calculation, and we could see no difference between the school years. Subtraction in azimuth calculation has absolutely nothing to do with the rate of mastery of astro-calculation., 長崎大学水産学部研究報告, v.48, pp.65-70; 1980},
 pages = {65--70},
 title = {天測計算における誤りの内容について},
 volume = {48},
 year = {1980}
}