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This dataset comprises Tomales Bay Water Quality data collected from May 1, 1967, until February 25, 1970. These observations were made from shore, but a small outboard whose official name is R/V Crago was used (call sign is WS 2159). The institution sponsoring the program is the Pacific Marine Station, Dillon Beach, California, 94929. The principal investigator is Dr. Edmund H. Smith. The position of the samples was determined by sighting from shore stations. The principal chart is the C and G S 5603. Times are given in Pacific Standard Time. There are three types of cards containing data. They are differentiated by numbers in column 78. Card type I (with a 1 punched in column 78) precedes each set of observations at a particular location. Each location was re-sampled approximately every two weeks during the period included by the above dates. Because the locations were determined by fixed shore features, the accuracy for relocating positions is within 50 feet for all locations.

This part of DS 781 presents data for the bathymetric contours for several seafloor maps of the Offshore of Tomales Point map area, California. The vector data file is included in "Contours_OffshoreTomalesPoint.zip," which is accessible from https://pubs.usgs.gov/ds/781/OffshoreTomalesPoint/data_catalog_OffshoreTomalesPoint.html. These data accompany the pamphlet and map sheets of Johnson, S.Y., Dartnell, P., Golden, N.E., Hartwell, S.R., Greene, H.G., Erdey, M.D., Cochrane, G.R., Watt, J.T., Kvitek, R.G., Manson, M.W., Endris, C.A., Dieter, B.E., Krigsman, L.M., Sliter, R.W., Lowe, E.N., and Chin, J.L. (S.Y. Johnson and S.A. Cochran, eds.), 2015, California State Waters Map Series—Offshore of Tomales Point, California: U.S. Geological Survey Open-File Report 2015–1088, pamphlet 38 p., 10 sheets, scale 1:24,000, https://doi.org/10.3133/ofr20151088. 10-m interval contours of the Offshore of Tomales Point map area, California, were generated from bathymetry data collected by California State University, Monterey Bay (CSUMB), by Fugro Pelagos, and by the U.S. Geological Survey. Mapping was completed between 2004 and 2010, using a combination of 200-kHz and 400-kHz Reson 7125, and 244-kHz Reson 8101 multibeam echosounders, as well as 234-kHz and 468-kHz SEA SWATHPlus phase-differencing sidescan sonars. These mapping missions combined to collect bathymetry from about the 10-m isobath to beyond the 3-nautical-mile limit of California's State Waters. Bathymetric contours at 10-m intervals were generated from a bathymetric surface model. The most continuous contour segments were preserved while smaller segments and isolated island polygons were excluded from the final output. Contours were smoothed via a polynomial approximation with exponential kernel (PAEK) algorithm using a tolerance value of 60 m. The contours were then clipped to the boundary of the map area. These data are not intended for navigational purposes.

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The Current, Temperature and Depth (CTD) data were collected by Naval Postgraduate School from Coastal Waters of California between 2-19 June, 1980 using ship Acania. Bathythermograph (XBT) data were collected at selected depths at intervals of 5m. The data submitted by Dr. Christopher N.K.Mooers in tape have been processed by NODC. The data is available in the C125 Bathythermograph XBT selected depth format as well as F022-CTD Hi resolution format.

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