liberato:I notice that I can hold my breath for quite some time if I am completely motionless but to kick 30 feet on one breath would be problematic and panic inducing. So, I would have a noisemaker of some sort that is never used for "hey look at this fish" but only for "come here now!" Then I would sit tight, make a racket, and have my buddy rescue me. Getting the attention of the buddy would be the first goal. A few people have mentioned lights but sound is the key. But then again if they are a lousy buddy to begin with by being so far away how do I trust they will immediately respond? (I normally have redundant gas so this is actually a hypothetical for me.)
See post # 76 by simbrooks. 30 feet is not really that far. I can easily cover that distance with 3 frog kicks. If my buddy or whoever is the potential air source is moving towards me then I will get the air even quicker.
This is part of what I teach during the OOA section of the OW class. One of the demonstration scenarios, with the student being the donor, is me swimming towards them after signalling OOA from a distance of 50 feet. I have them follow a similar scenario in which they are the OOA diver. During this scenario though we are swimming towards each other as soon as they signal OOA. They end up covering about 25 feet before the air sharing is established.
This all done in the shallow end and repaeted until they are comfortable with it. As the course progresses I spring a few surprises on them.
One thing that many people don't realize is what the actual distances are. Most homes in America have rooms that are 12 to 15 feet long. Take a look at that. Now envision you must cover that distance or the distance of two adjoining rooms. If nothing else lay out a tape measure on the ground and mark off 30 feet. Think about it. Could you swim that distance? Probably so.
Another thing, most people don't think they can go more than 10 seconds without taking a breath. Not true(excluding some diseases so lets not go there). I'm no specimen of excellent physical condition and I can exhale naturally and then hold that for 30 seconds with relative ease, so can most people.