I use both GPS and good ole coastal navigation with a full size paper chart spread out below and a plastified chart book and hand bearing compass in the cockpit. I'm desperately missing (and planning to install this winter) a working depth sounder.
Here in the San Francisco Bay I'd think (hope) that everyone is intimately familiar with the tide tables and current charts as the ebb current frequently exceed 6kts around the Golden Gate.
(I've taken a celestial navigation course, but I'm virtually never in a situation where I can practice the art).
1964 Ericson Alberg 35