40th bday under sail on a private yacht charter sailboat sailing in San Francisco Bay! #sailingday #charterboat #landscape #pier39 #picoftheday #photographer #photooftheday #things #sfthingtodo #sfthingstodo #sftours #sftourist #sftrip #sfthreads #sfsailingscenes #sfsailing #sailing #sailboat #sailingsf #captainsanfrancisco