Sas
Contributor
What you are describing is buddy seperation, not solo diving. Solo diving is an intentional act. If anything, this example illustrates a failure of the "buddy" system.
Yes, buddy seperation is very different to solo diving. I mean, they are both solo diving technically but accidental solo diving is not the same as people planning to do a dive solo. If one has not prepared appropriately for a solo dive and becomes seperated from a buddy, this can be dangerous and I believe many of the "solo diving deaths" can be attributed to buddy seperation rather than deliberate solo diving.