What is the abbreviation for a Colonel in the Coast Guard?

In the Coast Guard, the rank of Colonel does not exist as it does in other branches of the military. Instead, the equivalent rank in the Coast Guard is Captain. The abbreviation for Captain in the Coast Guard is CAPT. This aligns with the pattern across the uniformed services where ranks and their associated abbreviations may differ by branch. Therefore, CAPT serves as the correct representation for the equivalent rank often referenced as Colonel in the context of other services.