Welcome on board, is that East of London UK or Ontario?
Not necessarily a beginner, just another thing to learn, take your time and you'll find its worth the effort.
Enjoy.
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Know your PPO2, Pre-breath, Use checklists, Validate cells at 6mtrs, Use pure O2 at or near surface, Use a BOV, Don't dive Solo, Change Slime and Cells as recommended by Manufacturer and RTFM!
Beware Fridge Suck!
www.hugsac.org.uk