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ロランCナビゲーターによる測得船位についての一考察 I On the Ship's position by the Loran-C Navigator I 嶋田, 起宜 SHIMADA, Kiyoshi open access Loran-A is being gradually abolished and the use of Loran-C is spreading for its signal is automatically suited. On September, 1979, JRC Loran-C navigator was established on Kagoshima University fisheries faculty training ship "Keiten maru" (854.55 t) and Loran chain 9970 (SS3)-X station and Y station is being used and the difference was examined. The results are as follows; 1) Kagoshima Taniyama Harbor was the fixed point for the examination. The ship position on the chart was 0.35 mile south and 0.15 mile east. 2) Actual survey rank the center pressure case-89.7% was 0.5 mile extent - south east side was many. 3) NNSS position if was centered - disintegration was considerably big but 0.5 mile within 47.6% south east side was many. 4) 0.5 mile difference was considered and put into use and enough was known that south east was specially lean to. JNA-710型ロランC受信機,これと連動するNDC-710型座標変換器と附属ユニットNBA-3374型を練習船敬天丸に設置し船位の取得実験を行い次の結果を得た。 1. 鹿児島谷山港停泊中に於ける船位の誤差は海図上の船位よりも0.35mile 南,0.15mile 東であり,そのバラつきは非常に小さい。 2. 航走中の実測船位を中心とした場合,89.7%が0.5mileの範囲内にあり南東側に多い。 3. 人工衛星による船位を中心とした場合,大分バラつきが大きいが0.5mile以内に47.6%があり南東側に多い。 4. 0.5mileの誤差を許容範囲と考えれば使用に充分であり特に南東側に偏位する事が判明した。 鹿児島大学 Kagoshima University 1980-12-25 jpn departmental bulletin paper VoR http://hdl.handle.net/10232/13189 https://ir.kagoshima-u.ac.jp/records/10776 0453087X AN00040498 鹿児島大学水産学部紀要 Memoirs of Faculty of Fisheries Kagoshima University 29 193 201 https://ir.kagoshima-u.ac.jp/record/10776/files/AN00040498_v29_p193-201.pdf application/pdf 1.1 MB 2016-10-31 1980-12-25