背囊式BCC的一些連結和介紹:
背囊式BC的優點?
原文連結:
http://blog.yam.com/scuba/
"背囊式的BCD可稱之為有翅膀的(wing style)BCD,因為充氣之後,會在背後撐開,就像是一對翅膀。就跟所有的創新一樣,剛開始這種 wing style BCD 被嗤之以鼻,不太受歡迎,理由是容易讓你臉趴在水面,不容易後仰;洩氣也很麻煩。而事實上,就跟所有的新工具一樣,這種背囊式BCD也需要不同的使用方式。例如分叉式的蛙鞋 bio-fin頂流踢法就跟傳統的蛙鞋不同,必須高頻率小幅的踢動。很多人買了 bio-fin,卻沒學到正確用法,就誤以為這種葉片分岔的蛙鞋不好用。我看到的這篇文章說:「經過練習之後,這種wing styl BCD可以讓頭部高出水面甚多,浮力控制更容易,而且淨空的前上半身讓活動更方便自由,而背心式BCD 的包圍環繞設計,使活動受限。」
據我所知,這種背囊式的BCD用法跟背心式的BCD使用方式是不一樣,穿法不一樣,前者以環扣方式將二條帶子繞過鼠谿部固定,然後再將一條繞過臀部到前方固定住;充氣方面好像也跟背心式則是一樣。據說,這樣的設計最適合需要拍照的潛水員,身體水平懸浮的效果比背心式的更好。但因為浮力控制需要更精巧的技術,只適合有經驗且浮力控制技巧不錯的潛水員使用。這種背囊式的BCD主要是用於tek diving,背二支氣瓶都沒問題,而且保持流線型。"
原文連結: http://www.pintour.com/
"相對於夾克式的BCD,後背氣囊的好處是你會很靈活並有更好的流線型(利於減低阻力),因為氣囊在背後,前面只有三條貼身的背帶,不會象夾克式在腋下還有兩個氣囊,所以不會妨礙你的雙手,也不會有被夾的感覺,還有幾個固定掛環給你掛其他裝備。但後背氣囊是到U型或O型的,剛使用時會因為里面氣體的流動而感到難以控制,很短時間就會找到感覺並且習慣,問題不大。初學者絕對可以使用。"
"夾克, 適合新手和大部分人...而背飛, 有更好的流線形, 前面能騰出更多的位置和空間, 很多攝影愛好者選擇背飛, 就是方便雙手運動...也有的是因為過於"大只"(肥肉或者肌肉), 不想前面夾著而挑選背飛.最重要的是, 背飛的缺點是新手在水面(有時候水下也是)時,很難直立或仰臥...有條件的, 應該盡量去借用兩種BCD, 再做選擇"
背囊式BC的缺點?
這裡有不少對背囊式BC潛在缺點的討論
http://www.mobile01.com/topicdetail.php?f=648&t=4329351&p=1
但是這些質疑有道理嗎? 其實如果真的對現今潛水裝備的使用很理解,而不是人云亦云的隨口質疑,你會得到很不一樣的結論!
記得要選環型(甜甜圈形狀)的氣囊!
馬蹄形狀的氣囊有特別用途,但是比較不好操控
私評:
背囊式BC需要經過學習才能玩的漂亮,但是好處很多。建議有興趣的潛友向有仔細研究過
光聽網友說的一口好潛水可能不是獲得資訊最好的來源 ^_< !
廣告時間 ^_^
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閃光燈與錄影燈二合一水中攝錄最佳神器--i-divesite Symbiosis SS-1/SS-2
介紹連結:
http://lddivegear.blogspot.tw/2017/01/i-divesite-symbiosis-ss-1ss-2.html
頂極技術潛水品牌 Apeks(調節器、BC、潛水燈...)
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PS: 氣囊形狀討論
1. The one advantage I can think of with the horseshoe is that it DOES allow you to trap more gas on one side of the wing to balance carrying several bottles on that side. Other than that, the dount appears to be superior in every way I can think of. The donut wings are slightly more expensive at this time, they allow you to dump gas pretty effectively in nearly any position, they are available in any size a diver should need, and they are increasigly popular.
2. The shape of the donut wing allows it to have lift at the bottom of the wing. This is advantageous for those who wear weightbelts because it prevents the weightbelt from dragging down the hips. For those who do not wear a weightbelt, you can select a donut wing shape that has minimal lift at the bottom of the wing (Halcyon type shapes) that allow you to trim out easily in either single or double tanks.
3. I would recommend you examine the shape of any wing you intend to purchase, understand the center of buoyancy characteristics of that wing, and purchase something appropriate to your needs. If you dive an Al80 tank, and wear no weight belt, don't buy a wing with a wide bottom and a lot of lift down there. You'll be on your head by the end of the dive.
You also need to purchase a wing of the proper lift capacity for your diving. If you are diving an AL63 in tropical waters, something with 20# of lift might be sufficient. If you are diving a drysuit with a steel 104 in the PNW or off NJ, then your wing needs will be different.
4. Yes, the donut shape is easier to dump air in any concievable scenario. There are no tradeoffs.
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