Are Pilots really that confused?
Switch it off if you do not want it to ring just like on the golf course or in the cinema or get yourself a check list as follows: (Pilots use these I believe).
TELEPHONE MIGHT RING BUT DON'T WANT IT TO - ACTION ITEMS.
1. TEDDYBEAR Say Goodnight to.
2. TELEPHONE Switch
OFF or switch to
SILENT
Note. After Alarm clock rings at your preset time you may wish/require to select TELEPHONE back to ON again.
