A Radio Direction Finder (RDF) is an essential tool for navigation, used to determine the direction of a radio signal, often for distress signals or to pinpoint a location. Calibration and service ensure that the RDF system remains accurate and reliable. This includes checking the system’s sensitivity, verifying its accuracy, and replacing any damaged parts. Regular calibration improves the reliability of the RDF system, contributing to accurate navigation and increasing the chances of rescuing distressed vessels or individuals. Properly maintained RDF systems are crucial for operational efficiency and safety, especially in challenging maritime environments.