It was known from the start of the LORAN project that the same CRT displays that showed the LORAN pulses could, when suitably magnified, also show the individual waves of the intermediate frequency. This meant that pulse-matching could be used to get a rough fix, and then the operator could gain additional timing accuracy by lining up the individual waves within the pulse, like Decca. This could either be used to greatly increase the accuracy of LORAN, or alternately, offer similar accuracy using much lower carrier frequencies, and thus greatly extend the effective range. This would require the transmitter stations to be synchronized both in time and phase, but much of this problem had already been solved by Decca engineers.
it was known from the start of the loran project that the same crt displays that showed the loran pulses could when suitably magnified also show the individual waves of the intermediate frequency this meant that pulse-matching could be used to get a rough fix and then the operator could gain additional timing accuracy by lining up the individual waves within the pulse like decca this could either be used to greatly increase the accuracy of loran or alternately offer similar accuracy using much lower carrier frequencies and thus greatly extend the effective range this would require the transmitter stations to be synchronized both in time and phase but much of this problem had already been solved by decca engineers