Though I do not do enough snorkeling or underwater activity photos, this post is very helpful. (myfavouriteescapes.com)
If the pool is your primary source of exercise, you'll want to double check that your tracker supports multiple underwater activities. (pcmag.com)
On each Adventure Open Water Diver you are going to perform a certain number of underwater activity defined with your Instructor before the dive. (dsmlombok.com)