Crew can read exactly what location sharing does from the app (More → the privacy link on Today): tracking runs only while clocked in, stops dead at clock-out, and is used for the office live map, lone-worker safety and travel records. Off shift, nothing is recorded — and the server refuses stray pings even if a phone misbehaves. Each person can also see their own setting; if location is off for them, the map simply shows nothing.
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What location tracking shares — and what it doesn't
The crew-facing privacy page, in plain words.