How do you reinitialise a lost ARPA track?

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When ARPA loses a target, you need to reestablish reliable tracking rather than relying on the previous data. The proper reinitialisation is to stop the current tracking, reacquire the target on the radar to obtain a fresh detection, start a new ARPA track from that detection, and then verify the new track against other sources (like AIS or another radar) to confirm the target’s identity and data consistency. This approach clears any corrupted or uncertain track history, prevents confusion from a stale or ghost track, and ensures continuity with verified information. Deleting the target and hoping it reappears offers no reliable basis for reinitialisation; ignoring the loss leaves you with potentially inaccurate data; and switching to manual navigation pauses ARPA without restoring a reliable automatic track.