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Suspension of radiobeacon services

Mariners are warned that radiobeacons are liable to interruption of service for varying periods for overhauls, etc. This is particularly the case with radiobeacons on light-vessels, which may be withdrawn from station for periods up to several weeks. Reserve light-vessels are frequently not equipped with a radiobeacon.

"QTG" SERVICE

Circumstances may arise in which a ship, equipped with D/F apparatus, is not conveniently situated in relation to Radiobeacons, or for some other reason wishes to take bearings to a Coast Station. When employing this method of obtaining a bearing, the shore station must be called in the orthodox manner. To facilitate a ship taking a bearing with her own D/F gear, the following signals have been adopted.

QTG? = Will you send your call signal for fifty .seconds followed by a dash of 10 seconds on a frequency of ... kilocycles in order that I may take your bearing?

QTG (Reply) = I am sending my call sign for fifty seconds followed

by a dash of 10 seconds on a frequency of kilocycles in order that you may take my bearing.

Great Britain

200IB Royal Sovereign Lt. V. (GVM) 50°42'36" N. 0°26'48" E. Frequency: 291.5 A2. Range: 50 miles. Characteristic: Period 6 min.

Signal Group:

GVM( )

5times 16.67 sec.

Long dash ( ) 13.33 sec. \ 33.33 sec.

GVM ( ) - 3.33 sec.

I (1 min. 10 sec.)

Silent 3.34 sec.

Repetition of Signal

Group 33.33 sec.

Silent 290.00 sec. (4 min. 50 sec.)

Period 360.00 (6 min.)

Clear Weather Transmissions.

Times: At 08 and 38 min. past each hour. Signal: Two emissions of the whole characteristic. Fog Services: Continuous, commencing at 2 min. past the hour.

Remarks: Grouped with Pointe d'Ailly Lt. Ho. (No. 2180 A). 2018 Girdle Ness Lt. Ho. 57°08'21" N. 2C02'49" W.

Calibration Station

Frequency: 300.5 A2. Radio Signal: Period 15 sec.

GL ( ) twice 5.89 sec.

Silent 0.75 "

Long dash ( ) 7.73 "

Silent 0.63 "

Period . . . 15.00 sec.

Times: 0930—1030, 1330—1430, clock time, and on request, from one hour after sunrise to one hour before sunset.

Navigational assistance from radar stations

Mariners are cautioned that radar information is given merely as navigational assistance and is not a form of control. The pro­vision of such information does not relieve the master of a ship of his responsibility for the safe navigation of the ship. The position given, unless otherwise stated, is that of the coast or signal station through which contact is made.

Canada (Atlantic Coast)

Camperdown, N. S. 44°3r04"N. 63°32'32"W.

Frequency: Calling: 2,182 A3 500. AI, A2.

Working: 417, 375 AI, A2

Procedure: On request to Camperdown (VCS).

Remarks: Vessels entering or leaving Halifax Harbour may obtain their radar bearing and distance from Camperdown Coast Station in yards within the sector 003°—215°.

Canada (Pacific Coast)

First Narrows Bridge, Vancouver, В. C. 44018,57,, N. 123°08,16" W. Frequency: 1.630. A3.

Procedure: On request to First Narrows Bridge Signal Sta­tion (VAS)

Remarks: Vessels entering or leaving Vancouver Harbour may obtain radar navigational assistance. During low vis­ibility broadcasts are made at short intervals giving approximate positions pi vessels, obstructions, etc. in the vicinity of First Narrows Bridge and within the harbour limits, except south of a line 249° from the centre of the bridge.

POSITION FIXING SYSTEMS

Loran Chains in Operation North Atlantic Chain

Sandy Hook, N. J. .

1 Rate 1H0

Nantucket, I, Mass. Deming, Nova Scotia 1

Port aux Basques, Newfoundland J Deming, Nova Scotia

:ia J

о vi с « Rate 1H2

Baccaro, Nova Scotia

Con sol Stations in Operation

Northern Ireland

Bushmills (MWN) 55°12'20" N. 6°28'02" W.

Frequency: 266 kc/s. AI. 2 kW. Bearing of Line of Aerial: 040 13'. D4stance between Aerials: 2,520 metres (approximate-

iy).

Characteristic: 30 sec. Keying cycle, continuous note and call sign.

Total time: 40 or 60 sees. Service: Continuous.

Coverage: 065° to 195° and 245° to 015°.

Decca Chains in Operation

English Chain

Station Puckeridge A Norwich В Lewes С Warwick D

Master Red Slave Green Slave Purple Slave

Position 51°54'33"N. 0°00'05"E. 52°33'08"N. 1°20'00"E. 50°54'33"N. 0°0844,/E. 52°11'49"N. 1°21'53"W.

Frequency 85.00 kc/s 113 33 kc/s 127 50 kc/s 70.83 kc/s