Gray's Quarry sidemount The end part has a

The end part has a corrugated piece that is smooth on the inner side and keeps the snorkel away from the mouth during use when scuba diving

but surprisingly simple for the average diver by providing information clearly and simply with just two buttons

Recovery time with alarm

The Mathematical model of Giotto can make saturation and de-saturation calculations of dives carried out both with air and with nitrox in any moment of the dive

Gray's Quarry sidemount The end part has aGray Quarry is a 501 c3 non profit organization that seeks to promote the sport of scuba diving by providing a safe family friendly fun environment for recreational scuba diving and training. Bottom depth is approximately 60 feet deep, with no thermocline, and visibility from 20ft. to much better, depending upon the quarry's activity.