Mykonos dive centers rent full scuba equipment and typically support guided boat dives, Discover Scuba, courses and snorkel programs. Some centers list Nitrox and freediving equipment rental, but confirm cylinder sizes, Nitrox fills, computer rental, child sizes and camera rinse arrangements before arrival. Bring personal-fit gear such as mask, computer, prescription lenses, exposure suit and SMB if you care about consistency. A 3mm suit may be enough in peak summer for warm-blooded divers, while 5mm is smarter in May, October or repetitive diving.