The main objective of the National Ocean Survey (NOS) / California Marine Boundary Program (CMBP) fa to utilize tidal data obtained from the established tide stations to determine tidal datums of sufficient accuracy to delineate marine boundaries and support the NOS Nautical Charting Program. In addition to providing the surveyors with tidal bench marks from which boundaries can be delineated, it also provides information that enhances mapping of the coastal areas.
