Special Radio Direction Finder Calibration Stations for Atlantic and Gulf Coasts (1987)

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Special Radio Direction Finders south of Little River, South Carolina have not been researched and, therefore, are not displayed or listed.

Special Radio Direction Finder Stations

Eastern Point1 Light Station 42 34 48 70 39 54 298, 480
EP ()
Antenna is located on an orange and white checkered building.
Ambrose Tower Light Station 40 27 32 73 49 52 326, 480
T1 ()
Calibration available 0800 (local time) only on request to Rockaway Group on 156.8 mHz FM.
Cape May2 Light Station 38 56 00 74 57 42 305, 480
C3 ()
Antenna located on light.
Cape Henry3 Light Station 36 55 37 76 00 26 306, 480
F2 ()
Special fixed white light of 100 cp displayed at north center of light tower during calibration visible from 090° to 270°.
Thomas Point Shoal4 Light Station 38 53 56 76 26 11 293, 480
F3 ()
For calibration on 293 kHz follow procedure on p. xx, xxi (of light list) to change to 480 kHz, dip flaghoist.
 1 Request for calibration service may be made via Coast Guard Radio Marshfield (NMF) or via Gloucester Station on 2182 kHz. During calibration direction communications with Eastern Point Light Station can be made on VHF-FM channel 22 (157.1 mHz).
 2 Request for calibration service must be received 24 hours in advance via VHF-FM channel 16 (156.8 mHz) or in writing to Commander, Coast Guard Group Cape May, Cape May, N.J. 08204.
 3 Request for calibration service may also be made in advance directly to Commander, Baltimore Group, U. S. Coast Guard, Bldg. 70 USCG yard, Baltimore, Md. 21226.
 4 Request for calibration service may also be made Via Coast Guard Group Hampton Roads on VHF-FM Channel 16 (156.8 mHz).

All stations transmit continuously during the time required for calibration with keyed tone modulated carrier (H2A emission), except where noted, and have a reliable rnage of 5 miles. Their assigned characteristic is transmitted twice followed by a 20-second dash, the complete sequence being repeated twice per minute. The antenna is located on the light structure unless otherwise noted. In the event special calibration service interferes with the operation of regular radiobeacon transmissions, the special calibration service will not be given.

Special calibration operation will be made only upon request in advance to the district commander in whose district the calibration station is located, the address and district limits of which are listed on p. III (of light list). The day, time, and frequency on which special calibration service is desired must be stated. If service is desired on both frequencies listed, the time that transmission on each frequency is desired must be specified. Upon arrival at the station on the date and hour specified, station personnel may be contacted by means of usual whistle signal or flag hoist.