Radiobeacon System Map for North Atlantic (1987)

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	II	Nantucket Shoals Lighted Horn Buoy N	Buoy	NS ()	50	40 30 00	69 28 00
286	III	Montauk Point	Lighthouse	MP ()	125	41 04 02	71 51 47
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
298	III	Cape Henlopen	Radiobeacon	HL ()	125	38 46 36	75 05 16
298	IV	Cape Henry	Lighthouse	CB ()	150	36 55 35	76 00 27
306	I, IV	Clinton Harbor	Radiobeacon	CL ()	20	41 16 00	73 31 10
306	II	Little Gull Island	Lighthouse	J ()	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
308	II	Partridge Island (Can.)	Lighthouse	U ()	50	45 14 13	66 03 17
308	III	Southwest Head (Can.)	Lighthouse	N ()	50	44 36 03	66 54 20
308	IV	West Quoddy	Lighthouse	WQ ()	20	44 48 54	66 57 04
308	VI	Seal Island (Can.)	Lighthouse	H ()	40	43 23 28	66 00 53
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 12

Continuous Radiobeacons

290	Chesapeake	Lighthouse	CO ()	50	36 54 15	75 42 47
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	Ocean City Inlet	Lighthouse	OC ()	10	38 19 30	75 05 18
295	Brenton Reef	Lighthouse	BR ()	10	41 25 35	71 23 22
295	Scituate Harbor	Radiobeacon	SH ()	10	42 11 56	70 43 12
301	Block Island Southeast	Lighthouse	BI ()	20	41 09 09	71 33 07
301	Portland Lighted Horn Buoy P	Lightship	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	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
312	Five Fathom Lighted Horn Buoy F	Buoy	F ()	10	38 47 18	74 34 36
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	MR ()	20	43 47 00	68 51 19
316	Atlantic City	Lighthouse	AC ()	15	39 21 57	74 24 37
318	Cape Cod Canal Breakwater	Lighthouse	CC ()	20	41 46 19	70 30 04
319	Delaware Lighted Horn Buoy D	Buoy	D ()	10	38 27 18	74 35 06
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 24
322	Portsmouth Harbor	Lighthouse	NCE ()	10	43 04 15	70 42 30
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