NorthStar 961 Reference Manual page 324

Chapter 13 - Customizing Setup Functions
Page 13-54
To delete all HCRF information, including all charts and
permits:
1. Press the STAR key until you reach the SETUP MENU
screen, then press the CHART INVENTORY key.
2. At the CHART INVENTORY screen, press the HCRF
SPECIFIC key.
3. At the HCRF CHARTS screen, press the REMOVE ALL
HCRF key.
4. At the DELETE ALL HCRF CHARTS/PERMITS? dialog
box, press the YES key. Caution! Before proceeding,
remember that this step deletes all HCRF information,
including all charts and permits.
5. At the ARE YOU SURE? dialog box, press the YES key
(once you press the YES key, you'll only have a very brief
opportunity to stop the deletion process by pressing the
STOP key; if you don't, the deletion of all charts and
permits will continue).
After deleting all charts and permits, the DELETING ALL
HCRF dialog box displays the total number of charts and
permits deleted.
Deleting all HCRF dialog box
961/962 Operations and Reference Manual, Rev. A