Radiobeacon System Map for North Atlantic (1992)

Radiobeacon System
Most radiobeacons must share a group frequency with other beacons. Therefore, radiobeacons in the same general geographical area are divided into groups of up to six beacons transmitting on a single frequency with the sequence being repeated continually. Each radiobeacon transmits for at least one-minute out of each six-minute period in sequence with the other beacons of the group regardless of weather conditions. If less than six radiobeacons are assigned to a sequence group, one or more of the beacons may transmit during two of the six one-minute periods. Various colors are used to distinguish each group on the above map.
The SEQUENCE within a group is indicated by a Roman numeral; however, an asterisk character if the station transmits twice during the six one-minute. If neither a Roman numeral or an asterisk is shown, then the beacon transmits continuously and is marked as (always black).
SERVICE RANGE is shown in nautical miles.
The FREQUENCY is in kilohertz.
CHARACTERISTIC IDENTIFICATION consists of a combination of dots and dashes. The characteristic signal of all beacons is superimposed on a continuous carrier when they are transmitting. The last ten seconds of the minute are devoted to a long dash for maximum bearing accuracy using manual operation.

Sequenced Radiobeacons

286 I Highland Lighthouse
HI ()
100 42 02 24 70 03 40
286 IV Ambrose Lighthouse
T ( etc.)
125 40 27 32 73 49 52
286 V Great Duck Island Lighthouse
GD ()
50 44 08 32 68 14 47
286 VI Manana Island Fog Signal
MI ()
100 43 45 48 69 19 38
306 I, IV Clinton Harbor Radiobeacon
CL ()
20 41 16 00 73 31 10
306 II Little Gull Island Lighthouse
O ()
20 41 12 22 72 06 29
306 III, VI Horton Point Lighthouse
HP ()
20 41 05 06 72 26 48
306 V Watch Hill Lighthouse
WH ()
10 41 18 36 71 55 30
316 I, IV Execution Rocks Lighthouse
XR ()
20 40 52 41 73 44 18
316 II, V Old Field Point Lighthouse
OP ()
20 40 58 36 73 07 08
316 III, VI Stratford Point Lighthouse
SP ()
20 41 09 06 73 06 13

Continuous Radiobeacons

289 Cape Henry Lighthouse
CB ()
150 36 55 35 76 00 27
291 Fire Island Radiobeacon
RT ()
15 40 38 18 73 18 53
291 Halfway Rock Lighthouse
HR ()
10 43 39 21 70 02 15
291 Nobska Point Lighthouse
NP ()
20 41 30 58 70 39 20
293 Montauk Point Lighthouse
MP ()
125 41 04 02 71 51 44
293 Ocean City Inlet Lighthouse
OC ()
10 38 19 30 75 05 18
295 Scituate Harbor Radiobeacon
SH ()
10 42 11 56 70 43 12
298 Cape Henlopen Radiobeacon
HL ()
125 38 47 39 75 05 26
298 Nantucket Shoals Lighted Horn Buoy N Buoy
NS ()
50 40 30 00 69 28 00
301 Block Island Southeast Lighthouse
BI ()
20 41 09 11 71 33 04
301 Portland Lighted Horn Buoy P Buoy
PH ()
30 43 31 37 70 05 31
302 East Rockaway Inlet Radiobeacon
ER ()
10 40 35 11 73 45 11
304 Boston Lighted Horn Buoy B Buoy
BH ()
30 42 22 42 70 47 00
308 Cleveland Ledge Lighthouse
CL ()
10 41 37 51 70 41 42
308 Indian River Inlet Radiobeacon
IR ()
10 38 36 35 75 04 06
308 Manasquan Inlet Radiobeacon
MI ()
20 40 06 03 74 02 03
310 Beavertail Lighthouse
N ()
20 41 26 58 71 23 58
310 Smith Point Lighthouse
SP ()
20 37 52 47 76 11 03
311 Chatham Lighthouse
CH ()
20 41 40 17 69 57 02
311 Shinnecock Lighthouse
SN ()
20 40 50 32 72 28 44
314 Buzzards Bay Entrance Lighthouse
BB ()
20 41 23 47 71 02 02
314 Cove Point Lighthouse
CP ()
20 38 23 10 76 22 55
314 Matinicus Rock Lighthouse
IR ()
20 43 47 00 68 51 19
316 Atlantic City Lighthouse
()
15 39 21 57 74 24 37
318 Cape Cod Canal Breakwater Lighthouse
CC ()
20 41 46 19 70 30 04
319 Jones Inlet Radiobeacon
JI ()
10 40 34 50 73 34 24
320 Cuckolds Lighthouse
CU ()
10 43 46 46 69 39 02
320 Saybrook Breakwater Lighthouse
SB ()
10 41 15 47 72 20 36
322 Barnegat Inlet Radiobeacon
BI ()
20 39 45 28 74 06 21
322 New Bedford East Barrier Lighthouse
NB ()
10 41 37 28 70 54 22
322 Portsmouth Harbor Lighthouse
()
10 43 04 15 70 42 36
324 Wachapreague Inlet Radiobeacon
WI ()
10 37 34 24 75 37 30
325 Brant Point Lighthouse
BP ()
10 41 17 23 70 05 27
325 Cape May Radiobeacon
CM ()
10 38 56 38 74 52 20
325 Eastern Point Lighthouse
EP ()
10 42 34 50 70 39 54
325 Point Judith Lighthouse
PJ ()
10 41 21 39 71 28 55