Any military airbases feature plenty of ground crew using hand gestures and colorful wands to communicate with pilots. Here's ...

If you'd like to contribute to our future reporting and share your experience as a source, you can click here to fill out this quick ... the same since scuba divers use hand signals or write ...

Some of it's pretty obvious by context (like common motorcycle hand signals out on the road), but the majority ... by raising one arm straight up in the air with the palm facing forward, and ...

It had been planned - a deep dive for four experienced scuba ... used hand signals and underwater slates and pencils to write notes and arranged to share the remaining two tanks of air "breath ...