You can learn a great deal from a boats Hull Identification Number or HIN, in fact if your looking at a boat to buy you want to have this number. It confirms what year and model it is.
HIN for our 1978 Mainship Type I
MPC - This is the Federally assigned Manufacturers code for Mainship
000110 - This is the hull number for the production line of that boat. Mine is 110, making it the 110th built. Although some builders start with 100.
M - Not exactly sure, think it stands for "Manufactured"
78H - This is the date of build, 78 is for 1978 and the H is for March
34T - Stands for 34 foot Trawler