All changes to tower
| Date | Change | Source |
|---|---|---|
| 22 May 2011 | 1-7: nominal added; 8: nominal amended | David Kelly via e-mail |
| 7 Feb 2010 | 1-8: turning, frame id added; frame info added | John Arthur via 00008416 |
| 7 Dec 2006 | Tenor nominal added (F-16c) | GAD NBR spreadsheet via pNBR |