<prompt> Translate the following text to SwahiliAll centers are affiliated with one of the major certifying bodies, with PADI Professional Association of Diving Instructors being the most common.  <response>: Vituo vyote vya kuogelea vimeunganishwa na moja ya mashirika makubwa ya vyeti, na PADI Chama cha Wataalamu wa Waalimu wa Kuogelea kuwa ya kawaida zaidi. 