Boat hin / hull id number: home; history of the hin; what does it mean? boat hin laws; the science behind boat hin's. first of all, you may ask "what is a hin?"-. Hull identification numbers – some answers to your questions! the hull identification number geared to work with all boats, pleasure, commercial, aluminum. In 1972, the us coast guard was given the task of proposing a standardized hin format as part their new regulations for the safe construction of boats..
