. Commercial fisheries review. Fisheries; Fish trade. 20 wind flow will be enhanced, and midsummer coastal upwelUng will be more evident than last year, especially from Point Conception to Cape Mendocino. These conditions fore- tell increased turbulence, mixing, cold ad- vection (horizontal shifting of air mass) and evaporative cooling of the upper mixed layer of the sea; also, the intensification and ex- pansion of the length and breadth of the cold- water upwelling zone. Fishermen are ad- vised to observe weather trends carefully, and to make full use of the sea temperature charts and adviso
. Commercial fisheries review. Fisheries; Fish trade. 20 wind flow will be enhanced, and midsummer coastal upwelUng will be more evident than last year, especially from Point Conception to Cape Mendocino. These conditions fore- tell increased turbulence, mixing, cold ad- vection (horizontal shifting of air mass) and evaporative cooling of the upper mixed layer of the sea; also, the intensification and ex- pansion of the length and breadth of the cold- water upwelling zone. Fishermen are ad- vised to observe weather trends carefully, and to make full use of the sea temperature charts and advisory materials available from the Tuna Resources Laboratory via Radio Station WWD broadcasts. Full-scale operation of the Naval Weather Service Environmental Data Network link with the master computer facility at Monterey should augment La Jolla's understanding of oceanographic and climatological events this year. The staff of the Tuna Forecasting Pro- gram will receive computer products updated at 3-, 12-, and 24-hour intervals, permitting its members to monitor environmental changes almost as they occur. Significant changes observed between issuance of this forecast and commencement of the tuna fish- eries will be reported as they take place in the Tuna Forecast publication, special bulle- tins, and Radio Station WWD daily fishing in- formation broadcasts. As the summer season progresses, the staff expects to update and project oceanographic information and catch reports so fishermen at sea can make maxi- mum use of available IT'S FLUOROSCOPEO "Geronimo" Sails Entire Gulf The R/V Geronimo returned to Galveston, Texas, on March 31 after a 42-day cruise in the GuLf of Mexico. The ship sailed 6,032 nautical miles and occupied 115 oceanographic ; stations, none more than 40 miles apart. A number of stations included deep hauls for water at depths exceeding 3,000 meters. This is only the second time in the history of theGulf of Mexicothat a vessel has covered it dur
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