Call3.zip -

: Ensures operators have the correct grid squares for distance and bearing calculations.

: Use a script to download the latest raw callsign data. For example, N3FJP typically provides bulk data files that can be over 80 MB. call3.zip

: A feature that detects when the radio software is launched and checks if the local database is older than 30 days. Implementation Steps : Ensures operators have the correct grid squares

: Bundle the executable script, a README.txt , and a "Last Updated" timestamp into the call3.zip file. call3.zip

: Using a compressed ZIP format for the updater tool keeps the initial download small, even if the final text database it generates is large.