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How to Read the Hull ID Number
There appears to be four numbering schemes in
use. Dates for the transition from one scheme to the next
might be off plus or minus a year, but I believe it looks something
like this:
- 1971 - 1973, No HIN, just a metal plate at
the transom (inside cockpit)
- 1973 - 1975, No letters for month built (e.g.
CTYL16231074)
- 1975 - 1984, a mysterious "M" is a part of
all HIN's (e.g.CTYH9353M80C)
- 1984 - present, Year built represented with a
number (e.g. CTYH5390F697)
Model Year. For the boating
industry, the new model year starts in August. Since 1975, the
Month Built information has been represented with a letter. In
1984 the lettering scheme was changed to make "A" represent the
month of January. Here's a look at the two schemes:
| 1975 - 1984 |
Jan = F |
Feb = G |
Mar = H |
Apr = I |
May = J |
Jun = K |
| |
Jul = L |
Aug =
A |
Sep = B |
Oct = C |
Nov = D |
Dec = E |
| |
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| 1984 - present |
Jan = A |
Feb = B |
Mar = C |
Apr = D |
May = E |
Jun = F |
| |
Jul = G |
Aug =
H |
Sep = I |
Oct = J |
Nov = K |
Dec = L |
The Model Year scheme in use between 1975 and
1984 derived the Year Built information from the Model Year and from
the Month Built. For example, a boat whose last three letters
of the HIN were 82A would actually be a 1982 model year Catalina 27
built in August of 1981. Here's three HIN's
decoded:
| CTYL06121172 |
|
A Catalina 27 built
in 1972. Sail number 0612. |
| CTY |
= |
Manufacturer’s
Identification Code (Catalina Yachts) |
| L |
= |
Model (Catalina 27) |
| 0612 |
= |
Hull Serial
Number |
| 11 |
= |
Month Built? |
| 72 |
= |
Year Built |
| |
|
|
| CTYL4327M79J |
|
A 1979 model year
Catalina 27. Built in October 1979. Sail number 4327. |
| CTY |
= |
Manufacturer’s
Identification Code (Catalina Yachts) |
| L |
= |
Model (Catalina 27) |
| 4327 |
= |
Hull Serial
Number |
| M |
= |
??? |
| 79 |
= |
Model Year (1979). August is the start of a new model year. |
|
C |
= |
Month Built
(October). A=August, B=September, and so on. |
| |
|
|
| CTYB0184H495 |
|
A 1995 model year
Catalina 270. Built in August 1994. Sail number
0184. |
|
CTY |
= |
Manufacturer’s
Identification Code (Catalina Yachts) |
|
B |
= |
Model (Catalina 270) |
|
0184 |
= |
Hull Serial
Number |
|
H |
= |
Month Built (August). A=January, B=February, and so on. |
|
4 |
= |
Year Built (1994). Last digit of the year of manufacture. |
|
95 |
= |
Model Year (1995). August is the start of a new model
year. |
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