In the CCN, which segment is the 1-letter movement designator?

In the CCN, which segment is the 1-letter movement designator?

• A. The 2-letter location
• B. The 4-digit Julian date
• C. The 3-digit sequence number
• D. The 1-letter movement designator

Answer: (D)

A CCN is fixed in structure where each part has a specific length and meaning. The sequence starts with a two-letter location code, followed by a four-digit Julian date, then a three-digit sequence number, and finally a single letter that serves as the movement designator. Because the lengths are defined, the only part that is a single character at the end is the 1-letter movement designator. This final segment identifies the movement category, while the earlier segments—two letters for location, four digits for date, and three digits for sequence—have their own distinct roles and cannot fulfill the single-letter position. So the last segment is the 1-letter movement designator.

A CCN is fixed in structure where each part has a specific length and meaning. The sequence starts with a two-letter location code, followed by a four-digit Julian date, then a three-digit sequence number, and finally a single letter that serves as the movement designator. Because the lengths are defined, the only part that is a single character at the end is the 1-letter movement designator. This final segment identifies the movement category, while the earlier segments—two letters for location, four digits for date, and three digits for sequence—have their own distinct roles and cannot fulfill the single-letter position. So the last segment is the 1-letter movement designator.