Drifting passively on the surface with an inflated BC is far different than clinging to a rope, in a current and wind and waves and trying to yell and signal for help. The more you inflate the BC, the more drag you have and without a snorkel it is more difficult to maintain a streamlined position on the rope. Climbing, kicking back 6-800 feet on the rope to the boat can be super strenuous, depending on the size of the rope, the size of the seas, the current and the diver.
That is why, when the OP seemed to mentioned that the boat could have abandoned the ascending divers and left them on a mooring, and gone to retrieve him, I raised the issue that this might not be a good option.
Perhaps we could discuss what the protocol (for the diver and boat operator) should be when a diver ends up way down stream on a surface line, appears to be desirous of help, yet the boat is moored/anchored and there are several divers still in the water? It is an entirely foreseeable situation and the whole reason to run a long surface floatline is to handle this exact scenario. What does everyone one do when that happens - assuming no chase dingy??
Ah this rope thing had me confused. I've returned to the thread and reread. Yes, hanging on a rope has been ever so much more difficult for me a time or two (more) than drifting free. It can be very hard on the body and I will do most anything to avoid it. Sometimes there's just no choice.
I've learned over time not to try and swim in on that rope either. Other divers have been pissed off because I won't do it. They have more upper body strength than do I. I'll graciously let them pass me on the line if they're willing. But there's no way that I intend to have my arm pulled out of its socket because someone else is physically stronger than I am.
Getting tied up in that trailing rope is no fun either.
Then there was the time . . .
Very bad down cross current underwater with a down current as well. I'd called the dive from depth 3 times and been shaken off each time until I said screw 'em, I'm leaving before I can't. At that point, another diver decided to come with me and that was all it took for each of us to fight for the surface. The surface was ridiculous. Super choppy and flowing like a river. I was quickly separated from the other divers.
The boat was closest to the pair with the big camera and the one handed guy, so that's what they got busy with and at first, no big deal.
Then the boat rounded to try and pick up we remaining divers but the surface current was so strong that the boat got shoved off or captain hadn't timed it right or some darn thing.
Up to that point, I'd been faintly amused by the circumstances, observing, curious as to how this whole dive was playing out. Of course, at the same time, I was drifting futher and further from the other divers.
The boat came around again, missed me again, ??, and the boat boy decided to be proactive and frantically threw me a rope. It wasn't a diver drift rope, it was a rope for tying the boat up to shore and it had a great bloody knot in it about as big as my head, which of course, whacked me in the forehead, dazing me a second or two. Then I grabbed the rope and the boat boy again displaying his incredible strength began to pull me towards the boat. I should have let go because two things were happening simultaneously.
The heavy rope was tangling around my body and the boat was moving so that I was getting pulled into the motors. I'm screaming "wait wait wait" at the top of my lungs. Apparently not a known Indonesian word.
In any event, very close to a come to my maker moment.
I learned a few more things on that dive.
BTDT