Set up
Your callsign — the only step
Someone you would call
One tap on the Distress screen opens a message to them, already written. Nothing is sent automatically and you have to press send — a web app cannot do it for you, and this app will not pretend it can.
Their number stays on this phone. It is never sent to a watch, a relay, or anyone else's machine — there is no list of operators' contacts anywhere for anyone to take. A burn erases it; a panic wipe does not, so it is still there the next night.
A watch — optional, and only if somebody gave you one
Skip this. You do not need a watch to use NavCom, and having none is how most operators work. Come back when somebody hands you one.
What it adds: Query, Assist and Distress — the three things that need a person on the other end. What it does not change: everything else, which already works.
Handed to you in person, on paper or by whatever you already use. Nothing discovers a Watchtower on its own — a list of them would be a list of where operators are.