What is the purpose of a 900 code 'end of dispatch'?

• A. To indicate a channel change is needed.
• B. To log the dispatch for archival purposes.
• C. To signify the end of the current transmission and reallocate channel usage.
• D. To request a new code be started.

Answer: (C)

In radio operations, an end-of-dispatch signal marks the completion of a transmission and frees the channel for reuse. It tells everyone listening that the current call is finished and the channel can be reallocated to the next unit or dispatch need. This keeps limited radio resources flowing smoothly and prevents unnecessary holding of a channel by a completed conversation. It is not primarily about logging for archives, nor about changing channels, nor about starting a new code; its purpose is to officially close the current transmission and ready the system for the next dispatch.