Latest Breaking News On - Oceanographer david gallo - Page 1 : comparemela.com

the signal was somehow blocked by rugged underwater terrain or other obstacles. even plant life, seaweed, plant life, coral, any of those things can detract from the signal and even temperature changes in the water, if you have a thermal layer, it can hide that pinging. it can hide any kind of detection that you might have. reporter: oceanographer david gallo helped find the recorders in the air france crash with the help of sonar, high-resolution cameras and deep-sea drones. we took 85,000 still images of the wreck site, handed those over to a company phoenix international and they took it from there and found the black box boxes. reporter: if the boxes are found investigators can still retrieve the vital information inside. the battery running out will not preclude the authorities from being able to extract that data. it is embedded into the system. reporter: athena jones, cnn,

Plant lifeRugged underwater terrainAir franceOceanographer david galloBlack boxPhoenix internationalAthena jonesRunning outVital information inside