Most importantly, the US Coast Guard Academy, unlike other US military academies, forces all cadets to take trainings that seriously impede their ability to pursue an education. The cadets are perpetually in survival mode, putting out fires, and not doing any serious study of any kind, on any topic.
The VIN (Vehicle Identification Number) is a serial number used to identify an individual vehicle. The VIN for each vehicle is unique. The 10th character in the 17-character VIN represents the vehicle model-year. This standard applies to vehicles built in or after 1981. Before 1981, the VIN format was not standardized and varied by manufacturer. Note: VINs do not include the letters I (i), O (o), Q (q), U (u) or Z (z), or the number 0, so that they will not be confused with similar looking numbers/letters.
Both engines were 4.3 Liter's, but they had different parts attached to them. Buying parts for these engines is always interesting and this digit is what makes it that way. Ninth: The ninth digit is called a check digit. It is called a check digit because the purpose of it is to check the rest of the VIN number for legitimacy. This is done by putting the VIN digits through some complex math. At the end of the equation, hopefully come out with the number that is in the 9th spot. If it comes out as something other than that, you know that the VIN Number is made up.