What should happen when a double whistle occurs on the serve?

When a double whistle occurs on the serve, it indicates that there has been some form of miscommunication or simultaneous signaling by the officials, typically related to an improper serve or a missed call. In this context, the appropriate response is to call for a replay. This ensures that the game maintains fairness and that both teams have an equal opportunity to play under consistent rulings. The replay allows the action to be redone, effectively resetting the play and ensuring the integrity of the game.

A replay is necessary as it provides a chance to clarify the situation rather than awarding a point or continuing play under potentially ambiguous circumstances. This approach aligns with the principles of fair play and clarity, which are essential in officiating sports like volleyball.