Which CASREPS message type includes changes to information submitted on initial or previous updates?

• A. Initial
• B. Update
• C. Cancellation
• D. Correction

Answer: (D)

In CASREPS, a Correction is used to fix information that was already submitted in the initial report or in a prior update. It’s the mechanism for amending errors or changing details after you’ve put them into the record, so the official data stays accurate without starting a new incident. For example, if the initial message gave the wrong location or a wrong status, a Correction would update those fields to reflect the true details. By contrast, the Initial message starts the report with baseline information, an Update adds new information or progress (which may modify the situation but isn’t specifically about fixing errors), and a Cancellation ends the report entirely. The Correction is the best fit when you need to amend something previously provided.