Currents predicted by Local Knowledge at maximum flood at the San Francisco Bay Entrance (10:19 am on September 7, 2010).
Currents predicted by Tidetech at maximum flood at the San Francisco Bay Entrance (10:19 am on September 7, 2010).
Currents predicted by Local Knowledge at maximum ebb at the San Francisco Bay Entrance (3:36 am on September 7, 2010).
Currents predicted by Tidetech at maximum ebb at the San Francisco Bay Entrance (3:36 am on September 7, 2010).
Local Knowledge v. Tidetech Currents: Current Distributions
This is the first page of comparisons of the Local Knowledge and Tidetech ("TT") current models of San Francisco Bay (for related pages see the links at the bottom of the page). The images below show current distributions in the Central Bay at several timepoints, using one of several options offered by the Advantage program for displaying currents (color-coded "chevrons"). These examples readily exhibit the most obvious difference between the two models (systemic underestimation of current strength by TT), but differences in current direction are equally significant for laylines, routing and other tactical computations.
Currents predicted by Local Knowledge at maximum ebb at the San Francisco Bay Entrance (3:36 am on September 7, 2010).
Currents predicted by Local Knowledge at maximum flood at the San Francisco Bay Entrance (10:19 am on September 7, 2010).
San Francisco Program
TT Comparisons: NOAA Locations
TT Comparisons: Timing