Hull number

[olegreg]

I am trying to determine the Hull # for the CDSOA application. will the HIN# give me that that info?

HIN # is CPDE404M76H, is the hull number then 404?
Greg

[Sea Hunt Video]

Greg:

Several years ago Good Old Boat ("GOB") published an excellent article on hull identification numbers (HINs).

As GOB explains it, the characters (numbers or letters) in the "model-year format" which existed prior to 01 January 1984 are decoded as follows:

Character positions 1, 2 & 3 of the HIN are the manufacturer's identification code and assigned by the US Government;

Character positions 4, 5, 6, 7 & 8 of the HIN are an alpha-numeric serial number established by the manufacturer;

Character position 9 of the HIN could be the letter "M" if the sailboat was built before 01 January 1984. The letter "M" signifies the manufacturer is using the "model-year format" not the "numerical straight-year format";

Character positions 10 & 11 are the year of manufacture; and

Character position 12 is a letter indicating the month of manufacture in the "model-year format". Interestingly, this lettering starts with the letter "A" signifying August; "B" is September; "C" is October, etc.

Before 01 January 1984, if a manufacturer wanted to, he (or she) could alternatively use the "numerical straight year format" instead of the "model-year format". Then characters are decoded as follows:

1-8 are the same as above for the "model-year format";

9, 10, 11 & 12 would be the month and year of manufacture. Instead of an "M" at character 9 signifying "model-year format" there would be a number as part of the month (2 digits), followed by year (2 digits).

Post 01 January 1984 you could use another third format which is called the "new format" (catchy phrase). In the "new format", the characters are decoded as follows:

1-8 are the same as above for the "model-year format";

9 is the month of manufacture - "A" is January, "B" is February, etc.

10 is a number digit signifying the last digit of the year of manufacture or certification

11 and 12 are the model year.

Your post indicates the hull number has 11 "characters". I think there should be 12 "characters".

From your post, it is possible you are "missing" a letter or possibly a number before the letter "M". The letter "M" indicates Cape Dory was using the "model year format" in 1976. Since only 846 Cape Dory 25s were mfg. from 1972 - 1982 I think yours may be hull number "404". I think your Cape Dory 25 was built in March ("H") 1976. It is possible your hull number is "0404".

I hope this helps a little

GO SEAHAWKS

[pjust]

My HIN is CPDD0602M74B, and I'm Typhoon Hull #602, from which I deduce that positions 5-8 are the hull numbers.

[oldragbaggers]

You would be hull #404, but I'm surprised there isn't a zero in front of it.

[olegreg]

Thank you all!
g