Information for Yachtsmen
Panama - Pacific International Exposition San Francisco 1915

PANAMA - PACIFIC INTERNATIONAL EXPOSITION THE TIDES AT SAN FRANCISCO There are in each lunar day, of twenty-four hours and fifty minutes, two high and two low waters, which generally are un- equal in height and occur at unequal intervals. The low and high waters follow each other thus: From the lower low water mark (“low water large”) the tide rises to the lower of the two high waters (“high water small”), then falls to a low water (“low water small”) that is higher than the preceding low one (which fall, however, is sometimes so slight that it is indicated by an apparently long stand), then rises to the higher high water (“high water large”), when it falls again, through a long interval, to the lower low water. The Corrected Establishment, or mean interval between the moon’s transit and the time of high water, off the Exposition, San Francisco Bay, is 12h. 07m. The mean rise and fall of tides is 3.7 feet; of spring tides, 4.5 feet; and neap tides, 2.9 feet. The mean duration of the flood is 6h. 35m.; of the ebb, 5h. 50m.; and of the stand, 34m. The average difference between the Corrected Estab- lishment of the a. m. and p. m. tides of the same day is Ih. 28m. for high water, and of 38m. for low water. These differences when the moon’s declination is greatest are 2h. 30m. and Oh. 48m. The average difference in height of these two tides is 1.1 feet for the high waters, and 2.2 feet for the low waters. When the moon’s declination is greatest, those differences are 1.5 and 3.7 feet respec- tively. The average difference of the higher high and lower low waters of the same day is 5.2 feet, and when the moon’s declina- tion is greatest, 6.1 feet. The higher high tide in the twenty-four hours occurs about llh. 22m. after the moon’s upper transit (south- ing), when the moon’s declination is north and about Ih. 02m. be- fore, when south; the lower of the low waters, about 7h. after the higher high tide. ANCHORAGES Safe and snug anchorages in any weather for yachts can be found off Sausalito and Belvedere, both of which are directly op- posite the Exposition and easily reached by ferry. DOCKING AND REPAIRING FACILITIES The facilities for docking, hauling out and making repairs of any character at San Francisco are ample, vessels of all types being built at the local yards. Many battleships and cruisers for the United States Navy, including the world-famous “Oregon,” have been built here. 9