I received a new reply and now I understand the confusion :
You wrote me that they have the AOWD without deep which is possible with SSI therefore all the done specialities are written on the back of the card. An AOWD is allowing you to dive deeper if the deep is included. Do you know the diving organisation with who they did it? Or if possible send me a pic of the certification in order to give you the correct information.
We are accepting all diving organisation which are working under the standards of RSTC and who are a member of RSTC. CMAS is in the RSTC and therefor there certification are full accepted . We are a SSI and CMAS Dive Center.
I now realise that SSI and PADI use the same names for their respective certifications, OW and AOW. However the difference lies in the fact that an SSI AOW is only allowed to dive to 18 unless they have added an extra course. Whereas PADI AOW allows you to dive to 30m without having to do an exytra course.
So on their website when they mention AOW with a "Deep Diving Course" what they really mean is SSI AOW with Deep Diving Course.
I have written back asking if they will now allow our group to dive to 30m at Elphinstone. ( I have also sent a copy of my wife's training log in order that they can see that she has already dived to and has been certified at 30m.
This is the confusion that arrives because the various dive organisations can't reach an agreement between them about dive levels.
CMAS Level 2 = 40m
PADI AOW = 30m
SSI AOW = 18m
The above is without further training specialties ( basically at this point you will have your second level dive card)..