This document presents a boat localization and alert system that uses Received Signal Strength Indication (RSSI) to identify borders and alert fishermen. The system includes an RSSI module, Arduino microcontroller, audio playback circuit and motor to restrict boats from crossing borders. It detects the boat's zone and sends alerts. An emergency switch can send alerts to notify authorities. RSSI is used to set ranges to help fishermen identify borders and prevent imprisonment for accidentally crossing. The system design and working principle are described, including border identification, indication, information transmission and alerts. It aims to safely guide fishermen and resolve issues at borders.