manufactured as an experiment . 』 The experiments were made of measur ent of Loraル C receiving slgnals with this receiver at stati6nary point and ship . The resu ! ts were obta 三 ned as follows a ) Very fast trace was useful for weak groundwave observation . b) D ・ rip9 pr ・i ・ d・ ・ f high ・ ・ i・・ 1 th・ 9 ・・ undw ・v ・ ・ap9 ・ f... hi・ exp ・・im ・ . ・・e・ . e・t・ pd ・d t・ 1000 ・ ・uti ・ ・l miles or more . c ) Measurernent gignals at twilight useful for groundwave . discriminatio ひ . d) It has been

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... onstrated that Line of Position accuracy of 100 mete ' rs rms can be obtained . 匸