Hi Howard, When the fog gets that thick then your solution is the only proper one. Anchor; ring your bell to let others know that you are anchored, that still might be trying to find their way home, and wait for the fog to lift. Sailing back from Block Island years ago, four boats of our Goose Island Cruising (Boozing and Snoozing) Club (GICC) got into a pea-souper as we headed for the Watch Hill, RI entrance buoy. You had to find that, because if you didn't, there was a long hungry reef waiting for the unwary that stretched west from the Watch Hill buoy to Fishers Island. Visibility was down to about 1 boat length. We had stowed our sails and were all now under power, talking to each other via VHF radio. Dozens of boats were milling around wondering what to do.... One of our group heard the President of Pratt & Whitney Aircraft, talking to a friend. He had a large power boat, and was also approaching the Watch Hill entrance buoy. Our member gave him a call (our sailing gang were P&WA Engineering managers). Since his powerboat had radar, he asked us to do a 360 turn so that he could see us; and having found us on his radar, a few moments later he appear out of the fog. We tucked in behind him, like ducklings following their mother, and he took us all the way back to Noank, CT and our Marina at the entrance to the Mystic River. At the Marina entrance the fog was still so dense that we could barely make out the docks from 50 feet away, but we were home. So for years, our joke went, if all else fails during a heavy fog, call the President of Pratt & Whitney Aircraft, who has radar, and get him to act as Pilot to get home safely. It's nice when you have friends like that, who can help! Connie