When I first learned to dive, I did a few dives as a threesome (I won't call it a "team" of three) and I HATED them. We were diving in typical Seattle summer visibility, which is about ten feet, and what that meant was that, if ALL three divers weren't frequently checking on the whereabouts of the rest, it was very easy to get separated enough not to be able to see one another. I would see one diver start to swim off -- without signaling anybody, and without looking around -- and I would try to follow that person (without signaling, but with frantic looking around) and get anxious because I was leaving diver #3 behind . . . we lost people in the murk, and I spent my whole dives with my head on a swivel, trying to keep track of everybody. I eventually said, "No more threesomes."
Contrast that with today, where I probably do more than half my dives as a TEAM of three. What's different? First off, all three divers have keeping the team together as one of their highest priorities. That means frequent checking on one another's whereabouts, but it also means that if someone is going to move off, they'll signal and make sure all three divers are aware of the intent. That also comes from electing a team leader, so that there is ONE person making the navigational decisions (although they can always be negotiated). You know which of the other two is the MOST important to watch, because he's the one who is setting the pace. In addition, we all use strong, focused lights for communication. This means not just active signaling, but passive communication -- if I can see my buddies' lights moving curiously around, I know they are near me and they are well. (I use photographer's strobes the same way -- if Peter is flashing, he's happy AND he's staying put!)
So, the same dive organization can come out very differently, depending on the pre-dive communication, the prioritization, the equipment, and the divers' skills. I would always rather be in a team of three, because the reserve gas (and redundancy in general) is greater. You also have three sets of eyes looking for cool stuff! But it does take a little planning and execution to make it work comfortably.
Contrast that with today, where I probably do more than half my dives as a TEAM of three. What's different? First off, all three divers have keeping the team together as one of their highest priorities. That means frequent checking on one another's whereabouts, but it also means that if someone is going to move off, they'll signal and make sure all three divers are aware of the intent. That also comes from electing a team leader, so that there is ONE person making the navigational decisions (although they can always be negotiated). You know which of the other two is the MOST important to watch, because he's the one who is setting the pace. In addition, we all use strong, focused lights for communication. This means not just active signaling, but passive communication -- if I can see my buddies' lights moving curiously around, I know they are near me and they are well. (I use photographer's strobes the same way -- if Peter is flashing, he's happy AND he's staying put!)
So, the same dive organization can come out very differently, depending on the pre-dive communication, the prioritization, the equipment, and the divers' skills. I would always rather be in a team of three, because the reserve gas (and redundancy in general) is greater. You also have three sets of eyes looking for cool stuff! But it does take a little planning and execution to make it work comfortably.