Up until now Safemate users have been presented a so-called backup position in the absence of a fresh GPS position. Positions like this utilize the knowledge of GSM cell towers to infer an approximate position. Alas, the precision achieved by using this form of positioning has been low. Thus, this button will be removed from the user interface in the new platform release scheduled for early October.
It is still possible to use cell towers to position a Safemate coarsly, so if there is a real search and rescue operation, Safemate support should be contacted.