International Aquanautic Club
https://www.diveiac.comMailing Address:
Borbecker Str. 249
D-45355 Essen
Germany

Phone: +49 201 67 00 49
NDL Nord - National Dive League (Northwest Region)
https://ndl-global.com/Mailing Address:
NDL Nord
Raja Tee 12,
Kulna 76613, Keila V.
Estonia

Phone: +37 256 694 999
PADI
https://www.padi.comMailing Address:
The Pavilions
Bridgwater Road
Bristol
BS13 8AE
UK

Phone: +44 117 300 7234
PDA - Professional Diving Association
https://www.pdaww.de/en/Mailing Address:
PDA Headquarter
Körnerstr. 1a
68775 Ketsch
Germany

Phone: +49 6205 9079523
SSI GmbH - Scuba Schools International
https://www.divessi.com/en/homeMailing Address:
Johann-Höllfritsch-Str. 6
90530 Wendelstein
Germany

Phone:+49 9129 90 99 38 0
WOSD – World Organisation of Scuba Diving
https://www.wosd.com/en/Mailing Address:
Postbus 171
7940 AD Meppel
The Netherlands

Tel: +31 522 242593