@article{oai:nagasaki-u.repo.nii.ac.jp:00009273,
 author = {合田, 政次 and 久野, 俊行 and 中根, 重勝},
 journal = {長崎大学水産学部研究報告, Bulletin of the Faculty of Fisheries, Nagasaki University},
 month = {Mar},
 note = {We measured the relative error between the position fixes obtained by GPS and Loran C in the eastern area of the East China Sea (from Nagasaki to Okinawa), and evaluated the accuracy of Loran C. In advance of the evaluation, we considered the distance of propagation over the land, and divided the observation area into two parts along a line running from the master station to Satamisaki, i. e. the north area and the south area of the dividing line. In the north area, the relative error was less than 1000 meters, and the constant error of Loran C was 700～900 meters. In the south area, on the other hand, the relative error was 1000～1350 meters, and the constant error of Loran C was 1200～1400 meters. Furthermore, we examined the relative error while sailing and at anchor, the difference between the data obtained in daytime and at night, and found that there are few differences between them. We may say that the error of GPS (by threedimensional positioning) was so small that the relative error of GPS and Loran C was made by Loran C itself., 長崎大学水産学部研究報告, v.71, pp.177-185; 1992},
 pages = {p177--185},
 title = {東シナ海東部海域におけるGPSとロランCの相対誤差},
 volume = {71},
 year = {1992}
}