Another time for another bump!!
It seems that everybody agree about the first 6 digits of our C-cards plus the 2 digits letter at the end. These are what I found so far:
The first 6 numbers : your Dive Center/Certifying Agency (no doubt)
The One Letter (X letter) : mystery (random)
The last 13 numbers: possibly your card number in no particular order (uniquely random or randomly unique)
The 2 letters at the end: your dive center/certifying agency's area. AFAIK, it could be country or states. Mine is ID for Indonesia.
But this is some facts
- I saw 8 (eight) Open Water C-Cards of one group of 8 students taking course together, issued in the same day from the same Dive Center by the same instructor. They have the same first 6 digits and last 2 letter.
- Only 2 cards have the same X letter, the other four are different, from A to Z.
- All 8 card's remaining numbers begin with 275 after X. The next digit does not have any pattern: 2, 3, 8, 9, 6.
- One of them, card number 27526... continue his education. A week later got AA card number 27544.... Two days later, a CPR card # 27520... was issued. Then Rescue card # 27586... after 2 days. No pattern in X letter, except the first 6 digits.
So, I agree that this X letter and 13 numbers is just a card number in unique random. Something like a banking or hacking Key Logger. The number does not represent you as a diver number like 5 digits professional diver. But if you sign in to SSI website (
SSI :: SSI Scuba Schools International :: take your dive @ diveSSI.com), click Myprofile there is a 6 digits number above you photograph. The same 6 digits number when you go to MyC-Cards (under MY PROFILE). It is written:
C-Card Data: YOUR NAME (SSI Diver Number D123456).
So, the mystery is (partially) solved...
Kresna