[問卦] 出海人要怎麼知道水深?消失
最近小弟我的朋友做海測工作
我好奇問他如何測得水深?
他只跟我說用聲納就好啦!
而我反問他 假如中間遇到泥沙阻擋
會不會因為太混濁而回傳?
結果他啞口無言 回答不出來
請問這樣的聲納還會準嗎? 還是船長是透過改變頻率 調整波長?
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請p大講講看吧!!
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※ 編輯: maxmie (140.121.145.143), 10/24/2016 12:44:08
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係數這東西很難得知吧...?!
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※ 編輯: maxmie (140.121.145.143), 10/24/2016 12:58:29
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