Loran-C transmitters are organized into chains of 3, 4 or 5
stations. Within a chain, one station is designated "Master" (M)
while the other "Secondary" stations identified by the letters
W, X, Y and Z. Different secondary designations are used
depending on the number of station in a chain. This is
summarized in the table below. CONFIGURATION DESIGNATORS EXAMPLE
Master with 5 secondaries M V, W, X, Y, Z South Central U.S.
9610 Master with 4 secondaries M W, X, Y, Z Southeast U.S. 7980
Master with 3 secondaries M X, Y, Z Canadian West Coast 5990
Master with 2 secondaries M W, X Calcutta 5943 Master with 2
secondaries M X, Y East China 8390 By 1989, there were 16
Loran-C chains comprising 67 stations and transmitting on 100
kHz. In the year 2000 this had grown to 28 chains. Power levels
can range from as low as 11 Kw (Bombay 6042) to as high as 1.2
megawatts (China East Sea 8390) . In Russia, a navigation system
known as CHAYKA is compatible with Loran-C hence it forms part
of the workwide chain. Transmitting s