1985年6月至8月间,6000米级深潜艇‘救生号’调查了日本海沟。在深度4000米的海底安置了地震仪和倾斜仪,今后五年可获得地壳变动和海底地震的精确资料。还在深度3830米发现牡蛎、海参、蟹等生物群;在5916米处发现白瓜贝等生物群,这些生命终年不见阳光,只靠海底断层处冒出的含甲烷热泉生存。上述成果都是世界首创的。‘救生号’去年刚建成,造价1亿法郎,下潜深度6000米,可探测全球97％的海底面积。艇身舱壁用钛合金制成,艇长8.1米,宽2.7米,高3.2米,操作舱内可容3人,设有3个观察窗,能看到周围10 Between June and August 1985, the 6000-meter-class submarine ’Lifeguard’ surveyed the Japanese trench. Seismographs and inclinometers have been placed on the sea floor at a depth of 4,000 meters and accurate information on crustal changes and seabed earthquakes is available for the next five years. Still found at a depth of 3830 meters, oysters, sea cucumbers, crabs and other biota; found at 5,916 meters, such as white melon shellfish, these years of life without the sun, only by submarine fault at the methane-containing hot springs to survive. These achievements are the world’s first. Last year, the “Lifeguard” was built with a cost of 100 million francs and a dive depth of 6,000 meters to detect 97% of the world’s seabed area. The bulkhead of the hull is made of titanium alloy, with a length of 8.1 meters, a width of 2.7 meters and a height of 3.2 meters. The operation cabin can accommodate 3 people and has 3 observation windows and can see around 10