Hi all. I am sailing the SF Bay area and looking for some basic technology. Most of my sailing will be inland and a little coastal. I have a tri-data. What I would like is some technology to keep me out of trouble in the Bay in case I get trapped in fog. I don't need a huge chartplotter with lots of bells and whistles. Maybe just a handheld basic gps/sounder? I would like to see maps that include shelf depth, not just land outline. Thanks!