No. 276.
96
Royal ObsERVATORY.
HONGKONG STORM SIGNAL CODE.
(Local.)
97
NIGHT SIGNALS. (Lamps.)
1
2
3
WHITE WHITE
WHITE
GREEN
GREEN
GREEN
WHITE
GREEN
WHITE
GREEN WHITE
WHITE
5
6
7
WHITE WHITE
GREEN
GREEN GREEN GREEN
RED GREEN RED
Revised on 1st June, 1920.
DAY SIGNALS.
Meaning.
A typhoon exists which may possibly cause a
gale at Hongkong within 24 hours.
Gale expected from the North (N.W. to N.E.)
The Night Signals will be displayed, at sunset, on the Radio mast at the Royal Observatory, on the tower of the Railway Station, on B.M.S, Tumar, and on the Harbour Office flagstaff. They will have the sume signification as the day signals,
Signal No. 7 will be accompanied by explosive bombs as above, in the event of the information conveyed by this signal being first published at night.
SUPPLEMENTARY WARNINGS.
When local signals are displayed in the Harbour a CONE will be exhibited at the following stations :-
Gap Rock
San Ki Wan
Sai Kung
Sha Tan Kok
Signal. Symbol.
1
2
3
4
5
6
7
+
י!
22
J1
South (S.E
to S.W.)
21
East (N.E. to S.E.)
29
25
West (N.W. to S.W.)
Gale expected to increase.
Wind of typhoon force expected (any direction).
Signal No. 7 with be accompanied by three explosive bombs, fired at intervals of 10 seconds at the Water Police Station and repented at the Harbour Office.
The siguals will be lowered when it is considered that all danger is over.
The Day Signals will be displayed on the Radio mast at the Royal Observatory, at the Harbour Office. UL.M.S. Tamar, Green Island sigual mast, the flagstaff on the promises of the Hongkong and Kowloon Wharf and Godown Company at Kowloon, the flagstall on the premises of the Standard Oil Company at Lai-chi-kok, and the flagstaff near the Field Officer's Quarters at Lyemun.
Waglan Stanley Aberdeen
Tai Po
to notify the fact to native craft and passing ocean vessels.
Further details can always be given to occan vessels, on demand. by signal from lighthouses.
The object of the code is to give at least 24 hours warning of a gale (Force 8 by Beaufort Sente, or 40-45 m.p.h., mean velocity by Dines Anemometer) and also warnings of expected changes in the direction and force of the wind. Owing however to the uncertain movements of typhoons and to insufficient telegraphic observations, it will occasionally happen that signals 2 to 5 may be displayed without a gale occurring at longkong, or even Gap Rock, but the reverse is not likely to happen, except in the ease of typhoons forming in the vicinity and travelling rapidly towards Hongkong, or of a located typhoon increasing its rate of progression abnormally.
118
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