@BLACKCRUSADER, I am entirely with you. I often laugh seeing those "tec" divers making significant effort for keeping that unnatural "horizontal trim" position,
Just curious why its funny or why there is significant effort to keep in trim.
Generally most "tec" divers are using a back plate and wing or sidemount system and with the popularity of single tank BP&W growing exponentially in the recreationally diving community there are more people than ever using setups like this.
Now think about the physics of a wing. If you put some air in them they become buoyant and the natural path of least resistance if it is submerged in water is up. Next lets discuss the shape, majority are donut shaped/horse shoe shaped or if were talking about sidemount then just a big pancake shape of some sorts. So based on the shape of these big flat air filled balloons the will always want to float horizonal (if you don't believe be throw your inflated wing the pool and see how it naturally lays, I have yet to see a wing stand up on end) .
Next divers will put on equipment/weights so there negatively buoyant and to counter act this they will take that big flat buoyant balloon described above and strap it to there back. Instead of sinking into the abys diver will add gas to that balloon. Now think about where that big flat floaty balloon is attached to a diver and think about the physics how that is going to make the diver float. It makes a person naturally want to float horizontal assuming that have there equipment setup correct. Since the wing always wants to float up to the surface your back is the naturally high point for the gas in the wing. Same concept as if you were to put all the gas in the feet of your dry suit, guess what happens your feet point up and your head points down.
Lastly lets think propulsion, the whole point of diving is to swim around and have fun and look at stuff so. If your in a horizontal position and you kick your fins guess what direction you go in? Forward. If you in a vertical position and you kick your fins guess what direction you go in? Up.
Based on this I am not to sure why you think "tec" divers have to put significant effort to keep in trim or why its funny. Reason it is done is because it is a practical and efficient way to dive. If you have your equipment setup correct its actually very natural and do not require significate effort.
Next most of us "tec" divers dive CC. Try going in a vertical position with back mounted counter lungs. I guess if you like having hamster cheeks the whole dive and a significantly hard time breathing be my guest but for the rest of us its a lot more comfortable and natural to dive in trim.
