OPERATION LORAN is a net work of land based radio transmitters and was developed to provide an accurate system for long range navigation. LORAN Stations Operations are organized into sub-groups of four to six stations called ” CHAIN “.One station in the Chain is designated the ” MASTER ” and others are called ” SECONDARY ” or ” SLAVE ” Stations.
The theory is to calculate the time between reception of the signals from the MASTER and SLAVE stations, which are emitted at different frequencies , at low or very low bands 90kHz – 110 kHz. in pulse group and has power of 400 – 1600 kilowatts. The master station emits its own signal first, when that signals reach the slave station , it emits its own signal after a predetermined delay. When the master station’s signal reaches the aircraft , its Navigation system counts the time until the slave station’s signal arrives. Your position is found as the intersection of the line of two LORAN stations.