Frequencies in MHz. RX is what the station listens on, TX what it transmits on; leave TX blank for simplex. The tone is the CTCSS tone you transmit.
Location accepts an OS grid reference (SJ 3490 9020), a locator (IO83ml) or latitude, longitude. Each station's pocket card shows its own details.
Your data. Plans are kept only in this browser on this device. Nothing is sent to emcomms.uk. Names and phone numbers are personal data: share the printed plan only with those who need it, follow your group's data-protection policy, and delete the plan (or the file) once the event's records are closed.