Gil57usa
Contributor
While there is a difference between Diving and other activities, (Diving being dependant on life support equipment working in a hostile environment). Every day people drive alone, fly planes alone, climb mountains alone, etc., etc. If your skill level is there and your confidence level is there, I see no problem Diving solo. Proper preparation and application of safe and sane practices should carry you through the dive. On the off chance of a medical issue (heart attack, stroke, etc.). You would probably be toast, just the same as if you were doing any other activity solo.