May 4th, 2007

今 年 春 夏 宜 潛 水

Posted by xina in underwater filming

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未 來 幾 個 月 將 會 參 與 拍 攝 一 連 五 集 有 關 香 港 海 洋 生 態 的 紀 錄 片 , 是 港 台 外 判 節 目 , 會 在 八 月 左 右 播 出 。

想 知 道 多 點 有 拍 我 們 拍 攝 背 後 的 小 故 事 , 可 以 上 節 目 部 落 格 上 看 看 啊 !?

November 5th, 2005

Dive like a fish!

Posted by xina in Dive Gear

LIKE A FISH – REVOLUTIONARY UNDERWATER BREATHING SYSTEM

An Israeli Inventor, Alon Bodner, has developed a breathing apparatus that will allow breathing underwater without the assistance of oxygen tanks. This new invention will use the relatively small amounts of air that already exist in water to supply oxygen to both scuba divers and submarines.

Fish use the dissolved air that exists in the water in order to breathe. In the ocean the wind, waves and underwater currents help spread small amounts of air inside the water. Studies have shown that in a depth of 200m below the sea there is still about 1.5% of dissolved air — not much but enough to allow both small and large fish to breathe comfortably underwater.

The system developed by Bodner uses a well known physical law called the “Henry Law” which describes gas absorption in liquids. This law states that the amount of gas that can be dissolved in a liquid body is proportional to the pressure on the liquid body. The law works in both directions – lowering the pressure will release more gas out of the liquid. This is done by a centrifuge which rotates rapidly thus creating under pressure inside a small sealed chamber containing sea water. The system will be powered by rechargeable batteries. Calculations showed that a one kilo Lithium battery can provide a diver with about one hour of diving time.

Alon BodnerPatents for the invention have already been granted in Europe and a similar one is currently pending examination in the U.S. Initial financial support for the project has been given by Israel Ministry of Industry and Commerce and Bodner is currently looking for private investors to help complete his project.

If everything goes according to plan, in a few years the new tankless breathing system will be operational and will be attached to a diver in the form of a vest that will enable him to stay underwater for a period of many hours.

Source: IsraCast

February 3rd, 2005

Coron Divelog 6

Posted by xina in Dive Log

Date: 03 February 2005
Location: Luson Reef, Coron, the Philippines
Dive IN: na OUT: na (after lunch)
Duration: 62 mins
Depth: 16.2m Ave: 10m Max: 16.2
Visibility: 15m Water temp: 28C
Exposure Suit: 2/3mm Tank pressure IN: 200 OUT: 40
Equipment weight: 5kg
Buddy verification: Louis F. 966742

This reef is beautiful, exempt from the damage of illegal cyanide and explosive fishing. My DM showed me a lot of interesting sea lives, sometimes with a magnifying glass. He knew where different creatures hide… when we were next to a rock, he asked me to look under… haha, it’s really not easy to stay stagnant and look under the rock! Louis searched under the rock and suddenly a big sea turtle came out and swam away!

The corols are really beautiful and HUGE too, very colorful with many interesting shapes, some like giant mushroom in the forest! I like most swim through a group of fish, some of them a tiny silver yellow fish… sometimes fish stared at me right in front, just like pondering if I were a fish too!

I got ear pain by the end of the dive and lost buoyancy sometimes. This dive is my longest dive. Though was feeling quite cold and trembled a bit towards the end; I still want to stay there longer…………….

I so very much look forward to diving again, but it would be months after given I would be so busy working on my TV series until August!

I should have recorded all these earlier when I have more vivid memories….

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