The oldest business of it’s kind. since our first plans were sold for home construction in 1938, more than 100,000 hartley boats have been built.. Whisstock.com provides easy to build downloadable sailboat plans and yacht designs by george whisstock. Boat tag questions. what is a dep boat tag? is there an age limit for boat tag applicants? how do i register a new boat? can i get a boat tag on the web site?.