One of our highlight excursions was a SeaTrek Helmet dive in St Maarten. It was a great experience. Basically you put this 75LB helmet on you head (it does not feel very heavy underwater) climb down the ladder and explore. We were 20 feet below, and we did not need any scuba certification. You have a constant supply of air, the helmet does not seal against you body in anyway, it rest comfortable on your shoulders. The concept is pretty simple once the lady explains it to you, it is the same as turning a cup upside down in water, the helmet creates an air pocket that your head is in. We were able to spend about 20-25 minutes underwater and we really enjoyed ourselves as you can see from the pictures below.
The pictures where taken with a Canon S70 and a Canon WP-DC40 Underwater Housing Kit:
DamonLedet.com » St Maarten Helmet Dive…
Pictures from an underwater helmet dive in St. Maarten….