I can't answer it, but I found an ancient newspaper article from when American football officials 1st started using hand signals. It is clear from this that (1) only a small number of signals were used to begin with, (2) very few of these have remained the same to the present (touchdown being one that did, not surprisingly, and pass interference as well; not so with touchback and clipping, for example), and (3) many more have been added since then. There must be some source that explains their origin, which the ancient article really does not.
handjob
In volleyball, the umpire uses hand signals to communicate decisions clearly. Key signals include raising one arm above the head with an open palm to indicate a point for the serving team, and crossing the arms in front of the body to signal a fault or violation. Referees may also use a closed fist to indicate a replay or a double hit. Additionally, they signal the rotation and substitution by raising and moving their arms accordingly.
Referees in football, basketball and soccer use a whistle for various signals.
Turn signals are definitely preferred. Most drivers don't look for hand signals, but, they do look for turn signals. Some people don't even know how to make correct hand signals while driving.
Use hand signals.
Yes, it is legal to use hand signals when driving. In fact if your turn signal goes out you should use hand signals.
No, but you will need to use hand signals.
In table tennis, officials communicate using a combination of verbal cues and hand signals. Referees announce decisions verbally, such as calling points or penalties, while hand signals indicate specific actions like faults or game interruptions. Additionally, they may use a whistle to gain attention or signal the start of play. Clear and consistent communication is essential to ensure that players and spectators understand the rulings during a match.
You can go to the website Gobookie and print out a copy of the church ushers hand signs and signals.
No, turn signals are required on the vehicle.
Soccer referees do not necessarily need to speak multiple languages to effectively communicate with players and officials on the field. However, having knowledge of common soccer terms in different languages can be helpful in certain situations. Referees primarily use gestures and signals to communicate during matches.
If you mean turn signal hand signals, then yes.