LIST OF LIGHTS - Maritime Safety Information - National Geospatial ...

column 1: The number assigned to each radiobeacon by
this Agency.
column 2: Name and/or descriptive location of the
radiobeacon.
column 3: Approximate latitude and longitude of the
radiobeacon to the nearest tenth of a minute.
column 4: Radiobeacon characteristics. Included in this
column are the Morse code, period in seconds, length of
transmission and silence time.
column 5: Range (approximate) in nautical miles.
DESCRIPTION
(Radiobeacons)
Information is tabulated in eight columns as follows:
ABBREVIATIONS
aero . . . . . . . . . . . . . . . . . . . . . . . . . . . . aeronautical
tr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . transmission
si . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . silence
s. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .seconds
(4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 times
Transmission is continuous unless otherwise stated.
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column 6: Group sequence. Selected radiobeacons are
grouped together on the same operating frequency and are
assigned a specific sequence of transmission within this
group. This reduces station interference and unnecessary
return.
column 7: Frequency (given in kilohertz) and amplitude
modulation (see Table Symbols).
column 8: Remarks. Transmission synchronization, type
of radiobeacon (marine, aero, etc.), calibration, antenna
lead-in, calling frequencies, distance-finding information,
service charges, hours of transmission, directional signals
and other pertinent information.