161
COMMONWEALTH OF AUSTRALIA.
1917. No. 9.
The Astronomical positions are only approximate unless seconds are given. The bearings are given both True and Magnetic, and those relating to lights are from seaward. The visibility of lights is that in clear weather. Foy signals are sounded only in thick or foggy weather. The heights given are heights of focal plane above high water.
AUSTRALIA-SOUTH COAST.
Cape Nelson-Auxiliary Red Light to be discontinued.
MARINERS and others are hereby notified that the Auxiliary Red Light will be dis- continued after 14th May, 1917.
Position. Lat. 38° 26' S.; Long, 141° 33′ E.
Details. The Auxiliary fixed Red Danger Light exhibited from the base of Cape
Nelson Lighthouse will be discontinued after 14th May, 1917.
Charts affected. Admiralty Chart No. 1062--Rivoli Bay to Cape Otway,
2759b-Australia, Southern Portion.
Publications affected. Australia Directory, Vol. I., 1907, Page 387.
Admiralty List of Lights, Part VI., 1917.
JOSHUA F. RAMSBOTHAM,
Director of Lighthouses,
Department of Trade and Customs,
MELBOURNE, 20th February, 1917.
By Direction,
STEPHEN MILLS, Comptroller-General of Customs.
Circular No. 643-35.
The Panama Canal.
EXECUTIVE OFFICE
BALBOA HEIGHTS, C.Z., February 21, 1917.
Radio Time Signals.
1. There has been installed by the Navy Department, at the Darien Radio Station, Canal Zone, a time transmitting clock so constructed as to send time signals by radio. The clock is adjusted daily to Washington Observatory time by radio signal, with a maximum error not to exceed five-tenths of a second, ordinarily not to exceed one-tenth of a second. The signal is sent out by radio each day at 1.00 p.m., 75th meridian time. This signal begins at 12.55 p.m., and continues for five minutes. During this interval every tick of the clock is transmitted by radio except the 29th second of each minute, the 55th to the 59th second of each of the first four minutes, and finally the 50th to the 59th second of the last minute. The 1.00 p.m. signal is a longer contact after the longer break. The wave length used is 4,000 meters and is sent out so that any ship with ordinary commercial receiving apparatus capable of tuning as high as 4,000 meters should be able to receive it.
2. As the Navy Department of the United States has spared no expense in making the service reliable, it is desired that maximum benefits will result to shipping, and it is hoped that ship captains will communicate with the radio office at Darien, either by letter or radio, giving data as to distance of reception, clearness of signal, etc., in order that the service may be improved. If it is found that many merchant ships cannot tune to the 4,000 meter wave length, arrangements will be made to send time simultaneously from Colon Radio Station on a spark transmitter with shorter wave length.
CHESTER HARDING,
Governor.
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