 Moreover, because it is part of a Port of call, any vessel flying a friendly flag may anchor and its inhabitants may disembark and disrobe as long as they stay below the mean high tide.If they cross above it, they must proceed directly to customs; however, there is no customs house on the point.Immunity from local law applies to individuals in transit to customs as long as they do not tarry, so they will have transit immunity while they walk through Angel Island State Park to the ferry, over the Golden Gate Bridge, and to the Federal Customs House near Fishermans' Wharf.