The "d" option from the Main Menu is used to delete or disconnect a landmark. LITHOS will ask for the 6 character landmark name and then will give the following menu options.

Main Menu: Q 0123O IUCRSG NVAMBX DEPL FZH? d
 >d                                                                               
 Input 6-character landmark name. [q]
TEST01
 1. Delete
 2. Disconnect
 q. Quit
1
 Delete ENTIRELY? y[n]
y

 Current landmark = NONE  
Main Menu: Q 0123O IUCRSG NVAMBX DEPL FZH? 

1. Delete: Use this option to get rid of an unwanted landmark.

2. Disconnect: This option will ???