Advanced Trimix Course with Chris and Dave on April 30, 2011 advanced trimix Chris Garman dahab blue hole Dave Pilgrim DR5 heinrichs Weikamp tom steiner +
Snake Cave Dahab on April 29, 2011 abu helal cave system cave diving dahab trimix dahabdiverstechnical tom steiner +
The Heinrichs Weikamp "MKII" becomes the "2N" new design :-) on April 11, 2011 2N dive computers dahab divers technical heinrichs Weikamp MKII multigas diving computer tom steiner trimix computers +