If you do not have the proper training never use a SCBA, this can cause serious risks to your health.
Always look for a dive center accredited by the largest certifiers of the World. PADI, NAUI, IANTD, ANDI, CMAS, SSI.
Only dive with proper training, this offered by dive schools with duly accredited professionals.
When hiring a service diving, be it travel, baptism or output accredited divers make sure your guide is licensed and enabled for this function.
Require certification of your guide, this should be a guide, dive instructor, appeared in his Dive Master certification with your photo and the number of associated or if instructor, Instructor, with photo and number of associated.
Note the number of certification of your guide if you need further proof.
For the case of PADI, or visit www.padibr.com.br www.padi.com.
In case of emergency call 192 or 193 SAMU Firefighters.
If your certified diver dives will be even safer if you have DAN insurance.