Call3.zip

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

: Using a compressed ZIP format for the updater tool keeps the initial download small, even if the final text database it generates is large. call3.zip

: Ensures operators have the correct grid squares for distance and bearing calculations. : Bundle the executable script, a README

: Converts diverse source data into the specific call3.txt format required by programs like N3FJP's Amateur Radio Software . : Bundle the executable script

: A feature that detects when the radio software is launched and checks if the local database is older than 30 days. Implementation Steps