Regarding CDU data entry, if information is known, what should you do?

• A. Add the data
• B. Leave fields blank
• C. Enter only dashes
• D. Ignore the field

Answer: (A)

In CDU data entry, when information is known you should add it to the field. Entering the known values ensures the FMS has the exact data it needs to compute legs, transitions, and performance accurately, and it helps prevent warnings or incorrect defaults that can arise from blank fields. Leaving fields blank or putting placeholders can signal missing data and may lead to rework or errors when the system tries to interpret what’s there. Ignoring the field clearly leaves the plan incomplete. So, if you know the information, enter it.