. Examen de la pêche commerciale. La pêche, le commerce du poisson. 29. Le Dr Thomas S. Austin (centre), Directeur, Centre national de données océanographiques, James Pugh, opérateur d'ordinateur, et Charlotte d'étincelles, un programmeur, avec IBM System/360 modèle 40, son système électronique de fichiers contiennent le plus grand U, S, la collecte de données de station océanographique. "Avec ce genre d'information, il a tracé les deux voies de circulation de l'eau dans et hors de la Méditerranée vers l'fortheupper--lay- ers de l'eau et de l'ouest que l'eau devient plus profonde." Dans un autre cas, le Centre d'information sur les effets des glaces polaires w

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. Commercial fisheries review. Fisheries; Fish trade. 29. Dr. Thomas S. Austin (center), Director, National Oceanographic Data Center, James Pugh, computer operator, and Mrs. Charlotte Sparks, a programmer, with IBM System/360 Model 40, Its electronic files contain the largest U, S, collection of oceanographic station data. "With this kind of information, he plotted the two-way flow of water into and out of the Mediterranean--eastbound fortheupper lay- ers of the water and westbound as the water gets deeper." In another case, the Center's information on the effects of polar icecaps was needed. The freezing action in Arctic and Antarctic areas removes salt from water and makes it heavier. Then, the colder, heavier water flows along layers of equal density. It results in the creation of 'rivers' of colder water coursing along the ocean bottom. Dr. Austinpoints out: "A drop of seawater has a life cycle that can be traced with infor- mation stored in the IBM computer." The cycle can take thousands of years. It starts with the chemical combination of hy- drogen and oxygen in the atmosphere as pre- cipitation, "Precipitation enters the seas directly as rain, fog, or mist, or through run- off from rivers. It completes the cycle through evaporation by the sun." NODC's Many Sources NODC's information comes from many sources: world's navies, priv.ate shipping, scientists, oceanographic vessels, govern- ment agencies, and oil companies. According to Dr. Austin, the data's com- pleteness, currency, and availability are the system's key elements. Nansen Bottles & Other Devices Until recently, water samples were gath- ered mostly in Nansen bottles lowered by cable over the side of a ship. The bottles also have thermometers to take temperatures at. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble t

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