If you don't have a redundant air source, you should not be solo diving. Period.
Dive sites need to be evaluated as to the level of risks they pose for solo diving as safe solo diving involves both an accurate assessment of your abilities and the demands of the site coupled with the maturity and self control to recognize when the conditions preclude a solo dive. Diving on an unknown site with potential hazards deprives you of the ability to make an accurate assessment of whether the dive can be conducted safely and within your comfort zone. Solo diving isn't about pushing limits.
I will on occassion explore new sites solo, but I will do it in a progressive manner over several dives within tight parameters of saftey with a clear retreat to a familiar area available.
Dive sites need to be evaluated as to the level of risks they pose for solo diving as safe solo diving involves both an accurate assessment of your abilities and the demands of the site coupled with the maturity and self control to recognize when the conditions preclude a solo dive. Diving on an unknown site with potential hazards deprives you of the ability to make an accurate assessment of whether the dive can be conducted safely and within your comfort zone. Solo diving isn't about pushing limits.
I will on occassion explore new sites solo, but I will do it in a progressive manner over several dives within tight parameters of saftey with a clear retreat to a familiar area available.