Which abbreviation represents "Go Ahead"?

The abbreviation "GA" effectively represents "Go Ahead" due to its concise nature and widespread recognition in communication contexts. In various environments, especially in telecommunications, using abbreviations helps streamline conversations and ensures clarity, particularly when relaying messages under pressure. "GA" captures the essence of the phrase in a concise format that can be easily understood and utilized by public safety telecommunicators.

Other options, while creative, do not have a standard recognition or common usage in professional settings. "GoAd" and "GoAh" could potentially confuse others, as they do not typically align with standard abbreviation conventions in communication protocols. "GOA," while it might suggest "Go Ahead" to some individuals, is more often associated with different meanings in various contexts, making "GA" the most appropriate and commonly accepted choice for indicating "Go Ahead" in public safety communication.