Once you get the attention of your scuba diving buddy, usually done by rapping on your tank with a hard object, use these hand signals to communicate the most common messages underwater:
![image0.jpg](https://www.dummies.com/wp-content/uploads/217324.image0.jpg)
Once you get the attention of your scuba diving buddy, usually done by rapping on your tank with a hard object, use these hand signals to communicate the most common messages underwater: