diving hand signals

I'm looking for clarification and (hopefully) consensus on the hand signal to be used to terminate a dive. There seem to be a few options but none are, in my opinion, ideal and create a chance for miscommunication which can in turn lead to trouble underwater. Firstly, there is the "thumbs up"...

One-handed scuba signals - for numbers. I use, curious how many do... Simple video, yes, I agree...but I get a lot of Qs, so decided to put out a short vid. Going to start mid-week drops when I have short vids. This one is short, for sure and I put about as much energy into the Thumbnail as...

Scuba Diving Hand Signals commonly used while diving: These Diving Hand Signals are used the most by PADI Divemasters or Diving Instructors to teach there diving students. PADI Platinum Course Director Marcel van den Berg will show you the most common ones used in the PADI IDC, Divemaster and...