By Tony Johnson
Learn to use the current mini-charts in the back of your tide book to plan your day. They display the behavior of the currents in the Bay for every hour of the tidal cycle. The instructions on page 48 give you the procedure to adjust the figures on the charts to get accurate readings, but here’s a shortcut: If Max Flood at the Golden Gate is about 3.3 knots, or Max Ebb is about 4.5, the numbers in the arrows are correct. If the figures at the Golden Gate are higher, the figures in the arrows will be higher up to 50% at most. If they are lower, the figures in the arrows will be lower. But even if you don’t bother with all the multipliers, the charts give you a quick graphic perspective on what currents to expect during your sail.