All changes to tower
| Date | Change | Source |
|---|---|---|
| 10 Feb 2021 | 6: nominal added | WBF records (Richard Offen) via Email |
| 23 Jul 2014 | 1-6: frame id added; frame info added | Philip Denton via 00010808 |
| 25 Jan 2004 | URL changed | Gary J Sheppard: SDGR webmaster via e-mail |
| 8 Jan 2004 | URL added | Gary J Sheppard: SDGR webmaster via e-mail |