F 8
Local typhoon signals are exhibited on the Observatory radio mast and repeated at the Harbour Office, H.M.S. Tamar, Green Island, the Godown Company, (Kowloon), Lyemun, and Lai Chi Kok, during the day.
The local night signals are exhibited on the Observatory Radio Mast and repeated on the tower of the Kowloon Railway Station, on H.M.S. Tamar, and at the Harbour Office.
A translation of the non-local and local storm warnings is exhibited at the Harbour Office, the General Post Office and the Star Ferry Piers and also sent to the Cape d'Aguilar Radio station, whence it is broadcast at about noon and repeated every two hours until midnight. If a second warning is issued during the day, the later warning is substituted.
When a local storm warning is displayed at the Observatory a cone is exhibited at several outlying stations for the benefit of native craft and passing ocean vessels.
In the following table is given the number of hours the local signals were hoisted in each of the years 1918-1922.
Year Red Signals. Number of hours hoisted. Black Signals. Number of times fired. Bombs.* 1918 33 102 1 1919 78 105 1 1920 107 156 1921 9+ 121 1922 181 154The figures in the above table include the number of hours that night signals, corresponding to the day signals, were hoisted.
The red signals indicate that a depression exists which may possibly cause a gale at Hongkong within 24 hours. The black signals indicate that a gale is expected at Hongkong.
* Three bombs fired at intervals of 10 seconds indicate that wind of typhoon force is anticipated.