What word indicates the transmission has ended on VHF radio?

The word that indicates the transmission has ended on VHF radio is "over." In the context of radio communication, particularly in maritime operations, the term "over" is used to signify that the speaker has finished their message and is awaiting a response from the other party.

Using "over" conveys clarity and ensures that the receiving operator knows they can now respond. This is important for maintaining effective communication and preventing misunderstandings, especially in situations where multiple parties may be communicating simultaneously.

While "out," "clear," and "stop" may seem like they could indicate the end of a communication, they do not specifically convey the intention for the other party to respond, which is the purpose of using "over." Therefore, "over" is the correct term to indicate that a transmission has concluded, allowing for a prompt reply from the other vessel or unit.