accordance with the appended table :-
446
DEPTH
SOUTH
OF WATER YARD-ARA
NORTH YARD-ARM
DEPTH OF WATER
SOUTO YARD-ARM
NORTH YARD-ABAI
Feet.
20
Feet.
30
21
31
22
32
23
33
24
34
25
35
26
36
27
37
28
38
29
39
As hitherto spherical shapes will be used by day and white lights by night.
A spherical shape, or a white light, at the mast head indicates rising water and at the peak of the gaff a half foot.
Approved:
1. A. LYALL,
Commissioner of Customs.
CUSTOM HOUSE,
SHANGHAI, 1st September, 1920.
H. G. MYHRE,
Harbour Master.