Searching for missing pigeons

Exploration Stage: Postal Dovecote
From: Leon
Description: I have something that can help save missing pigeons. My pigeons have a beacon in case they get lost. But the beacon has stopped working. Probably due to fog. Can you help me find a small radar?
Completed: This is a radar that tracks my pigeons. If I release the pigeons, they will fly towards the culprit's hideout. If I give the pigeons a signal booster, this radar should be able to detect the pigeons caught by this radar. However, there is no booster.