For the past several years on this Dominica trip I have only used Nitrox on the morning boat dives that are included in the package rate, then for all shore dives (afternoon and night), and the boat night dive, I only use air. I have never been close to deco, especially since you don't need to go past 50ft to see stuff on the shore dives. Most of the time when I'm taking photos on shore dives, I generally stay above 50ft. Since I'm diving on air more often, I wear an extra dive layer to help keep the chill off.
Yes, you can go a lot deeper on the shore dives, if you want to, since the shore is a gradual drop and continues on out to.........
Edited by Resqdew, 11 April 2017 - 11:16 AM.