Lets just say there a lot of IF's in Fred's arguement, but all are possible. Hopefully during your training you will have gotten used to diving in some of those conditions, but as others have said, its up to you and your dive buddy/team what risks you take, even if it is a negligble risk in others eyes. With Fred's examples, i think that almost anything that could go wrong with your plan did, doesnt mean any of those arent possible though.
But would you just use a gap type reel for the entrance to main line? I couldnt see the advantage in using a main or safety reel, essentially depriving you of it during the rest of the dive, particularly if it is only a matter of <20ft from the opening (upto 50ft max gap reel i thought i saw). Just questioning, dont actually intend to use this knowledge until i get furter in training - just to reassure you, but my enquiring mind and desire to learn is always there to question things.
But would you just use a gap type reel for the entrance to main line? I couldnt see the advantage in using a main or safety reel, essentially depriving you of it during the rest of the dive, particularly if it is only a matter of <20ft from the opening (upto 50ft max gap reel i thought i saw). Just questioning, dont actually intend to use this knowledge until i get furter in training - just to reassure you, but my enquiring mind and desire to learn is always there to question things.