212920-1934-Supplementary-Notice-to-Mariners — Page 2

668

No. G. M. T.

H. K. St.

Time.

Nature of Transmission.

Station and wavelength.

00

1200

2000

9

1200

2000

10 1255-1300 2055-2100

General inference from 2 p.m. observations and forecast for 5 districts, as No. 4.

General inference and forecast for district C from 2 p.m. observations.

Time Signals as at 9.55 a.m.

VPS as for No. 1.

ZBW on 355 m.

telephony.

VPS as for No. 1.

2. In addition storm warnings will be broadcast by VPS on 600 metres and 36 metres, and by ZBW on 355 metres telephony upon receipt. They will be repeated as follows:-

ZBW (355 m. telephony). At the two subsequent hours.

VPS (600 m. and 36 m. telegraphy). At 18 minutes past each of the sub-

sequent two hours.

When Hong Kong is definitely threatened with cyclonic gales, extra warnings will be broadcast as frequently as possible (usually at two-hourly intervals) by the Director of the Royal Observatory via ZBW on 355 metres telephony.

3. The Time Signals will be preceded by the following warning signals from VPS, 2 minutes before the emission of the Time Signal :-

CQ DE VPS HK TIME WAIT

4. *Shipmasters are earnestly requested to co-operate in order that the synoptics. and forecasts may be as accurate as possible. Routine observations made at 6 a.m. and 2 p.m. H.K. Standard Time (2200 and 0600 G.M.T.) are specially requested, and when in the vicinity of a typhoon it is hoped that observations will be sent as often as is found convenient. Continuous watch is kept at Cape d' Aguilar (VPS) on 600 and on 36.23 metres from 6 a.m. to midnight. The information primarily required is :-

1

Ship's position (Latitude and Longitude to of a degree)

Time of observation

Barometer reading (any unit)

Wind direction

Wind force

Weather

10

Iwhich may be sent in the form found most convenient, e.g. in plain language or by

nternational Code. The following data may be added if available:

Air temperature

Temperature of sea surface

State of sea

Direction of swell, and Visibility.

5. Any reports forwarded should be distinguished by a suitable combination of the letters a, e, m, u, signifying whether the barometer is an aneroid (a) or mercurial (m), and whether the reading is corrected (c) or uncorrected (u); thus "

would signify

mc

* Masters of "A" and "B" selected ships are requested to assist, if possible, without detriment to the routine prescribed by international agreement.