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HONG KONG DAILY PRESS, THURSDAY, NOVEMBER 12, 1931.
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FEATURES
INCREASED SAFETY or sight of the ships, involved did ture which might prove of consider
IN SHIPPING.
carry" direction. Anders which were able value on lonely and isolated
not effectively used. This conûrma | const lines.
the necessity for collaboration and SIGNIFICANT FIGURES OF constant practice in the use of the GREAT LAKES STRANDINGS, į direction finder as a means of any
gation The Master of avery ship Carrying a direction Ander should Insist on its regular use in any and all weather conditions, so that those responsible for its operation and those responsible for applying the romits can become so accustomed to working with each other, that there will be no hesitation or mis- understanding when wireless bear. inga are vital to the ship's-salety:
A recent issue of the Lighthouse Service Bulletin, published by the United States Department of Com merce, contains some interesting figures relating to strandings of Tessela in the Great Lakes. These figures, which are considered in the following article, show a marked reduction in the number of strand, ings side wireless direction finders and wireless, beacons were brought into general use, a fact which allows the inferium to be drawn that their the navigator, especially in adverse introduction was an important con-weather conditions, as they provide tribution to the increased safety of him with an independent check on shipping.
his own figures.
1!)
Daily practice with the direction finder will also be appreciated by
The figures published cover a While the statistics published are period of eight years from 1993, to limited, they show to a dogree 1930, the first four years being unwhich leaves very little room, for Laffected by the introduction of wire doubt, that there, has been a de- less, while it is assumed that the finite reduction in the number of wireless beacon stations and diree strandings over a period when wire tian Anders were fully offective less bacon station and wireless during the fears 1027 to 1930, direction finders were in effective use in the Great Lakes. The perio. dical publication of figures such as these will, we believe, be helpful as tangible evidence of the practical
Strandings Reduced by Hall.
ابیر
Accidents to certain groups of vcoscla form the basis of the figuros
In addition, the Marconi benenn in the English Bank Light Veasel will operate in conjunction with n submarino sound signalling device so that navigators can estimate their distance as well as their direction from the light vessel. The submarine sounding device is to be Atted by the Marconi Company, and arranged so that at stated periods the wireless beacon and the submarine sound oscillator will transmit simultaneously, a series of dots at regular intervals. By counting the number of dots receiv
d by wireless before heating the first dot transmitted through the water with the speed of sound (4,800 feet per second in water), the navi. gator "cap easily compute his dis- tance from their source.
Code Signals to be Adopted.
It is understood that the beacon station at Lobos Island will trans- mit on a wavelength of 1,000 metres, and the distinctive 60-sevond signal allotted to the station will be as follows:-Three calt letters L in Moram characters (10 seconds), scries of dashes (30 seconds), three call letters L (10 seconds), 10 seconds silence. Each transmission
Published, and for the years 1925-eronomy of wireless, and is such will consist of five repetitions of
1990; 572 ships were included. Of will appeal to diipowners, shippers these, there were 76 strandings, and underwriters.
proportion of one in 7. In con- sidering the following four years, --1023-1030, when the wireless facili
ties were in effective, operation 470 ships were affected, and there were 3 strandings-s average of 1.in.
15.
WIRELESS FOR NAVIGATION.
BEACON STATIONS FOR
URUGUAY.
Three new automatic wireless beacon stations are to be erected on the ruguayan const by the
I is, of course, recognised and admitted that it is impossible to say to what extent this big reduc tion in accidents is dae definitely to the introduction of the wireless Marconi Company on behalf of the fagilities, but it is significant that Hydrographic Department of the the shipping interests" involved sar Government of Uruguay. The sta that the influence of wireless is a
tions, which are expected to be very important factor.
placed in coinmission in the summer of 1999, are to be of the fixed omni- directional type,
It is found that the reports of Masters whose vessels have met with an accident, are, generally speaking, not submitted with suf Acient detail to reveal whether the
this distinctive aigual,
་་
on
HAVE YOU HEARD THESE?
Here are lists of long-wave and short-wave stations which should be ploked up by sayons in Hong Kong who has a mode- rately good sot suitable for re- Eceiving such ägnala. Success. in plaking up these stations also depands very largely 'upon tav. ourable atmospheric conditions. Readers are invited to add to this list should they sucosed in picking up any station not in. eluded. in alther of these lista.
STATION
CALL STON
67.65 Dobints Garmany) 60,13 || Khabarovch (Russia) 36.7 Nanaw 30. Mosco 43.6. Rome
A.F.K. |RAST »
A.G.J.
R.F.N.
1.M.A.
Perth
6.A.G. V.3.1.4.B.
$15
38.6
LONG-WAVE STATIONS.
WaYe length (Metro) Station -900-Manila- 977 Shanghai 345 Tokyo
virg
Call Kilo Bign... cyals K.Z.I.B. 1,153--
K.8.M.S. 1,083 J.O.A.K. 870-
853 Hiroshima J.O.R.K. 880 355 Hong Kong Z.B.W. 846 357.1 Bombay V.U.B." 840 381 Sapporo
JOLE
300 Keljo, J.O.D.K. 370 Nagoya J.O.C.K 810 3701 Calcutta 7.U.C. 800.8. 360 Kumamoto J.O.G.K. 790- 300. Sendai YORK. 770. JQAK 760 JOB.K 780
395 Dairea
400 Oaks
J
CM.B.. 738 K.Z.R.M.
410. Canton 480 Manil
SHORT-WAVE STATIONS,
TIME (HONG KONG)
OF WORKING
4,434 Mon, Wedi & Frii, 6. 4,090 6-10 p.m.
6,291 Not regular
5,000. Tue, Thura, Sat., 8 pa 6,896 Bunday midnight
7,145 | Dally 8.80 p.m....&.17 p.m.
7,810.) Not regular
7780 Daily 11 p.m.
8,108 Tues. & Fri, 0 pm D
2,230|| Not regular
9,508 Not regular
9,820 T3 am Sat. 3. & 10 am..
9,500 Not regular
9,977, Midnight' daily
11,020 Midnight- am. daily
11,781 7.80 p.m. & 3. sm, daily, except
Saturday and Sunday
19,850 € a.m. Wed, Fri, Sat. ---
Singapore Kootwijk (Holland) P.C.L. $7. Bangkok (Biam)
Bydney
HSLPJ.
81.58 Belbourne 8148 Bohenectady 31.20 Eindhoven (Holland) 31,28 | Sydowy-
2.B.L BLO
WA.X.&.F.
0,550 Daily 7.m.
P.C.J. 2.F.C...
811
Nairobi (Kenya) 17.LO
23.6.
Bydney
174
27,8
Bandoeng
1.ME PLE
10,596 Not regulie
26.58
Chelmsford (England) 8,5.W.
at Cape
245
Manila
X.L.X.E
28.35 Schenectady
210
18.88 Bandoeng 18.4
P.L.G.
Kootwijk (Holland)
P.C.L
P.L.F.
HB.1.PJ.
P.C.E.
PLE
W.S.I.K.
The beacon station Polonio will transmit
'the wave- Tength of 1,050 metree, the distino- tive 60-second sigual being as fol- lows-Three call letters P in Murse characters (10 seconds), series of dashes (30 seconds), three call letters P (10 seconds), 10 seconds' silence. Each transmission will con sist of five repetitions of this signal. The allotment of a "distinctive signal for the English Bank Light
ed in view of the special arrange ship has not yet been finally decid
ments for the transmission of-a. series of dots in conjunction with the submaritie signal devise. It is understood, however, that the sta- tion will be allotted a distinctive wireless beacon signal, eommencing Two of the transmitters will be with the letters "BI" in "Morse installed in lighthouses at Lobos characters. Island and Cape
Polonio; necident might have been prevented third in the
and the
ist Bank Light by the use of a wireless direction Versel. Ander. This is especially the case. with shipa not provided with direc- tion finders."
Direction Finders not Effectively
Used.
Investigation has been made of such cases as were available, and from the results of these it would appear that there were 30 strand ings in the years 1923-1920 in
The transmitters, aro designed to
operate "on two definite wave: lengths, one of 400 metres and one. between 050 and 1,000 metres Normal operation of the beacon signale will be on the higher wave- length in each caso, but a telegraph keying circuit has been incorporat
ed so that in case of emergency or special need the beacons can be used
as wireless telegraph stations, and localities where, there is every in this case the one metre wave- reason to believe, the use of a length would be necessary to com wireless direction finder would have
municate with ships nud coastal prevented the accident. In the
wireless stations, Three Marconi gears 1097-1930 there were only ton
Type R.G.27 receivers have also accidents which possibly might have been supplied, so that it necessary been avoided by the use of wireless complete transmission and reception direction Anders, and of these six services can be carried on, a fen-
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174 Bandoong 15.9
Bangkok
16.8" | Kootwijk (Holland)'
15.74 Barce
155
Nancy 13.98 Pittsburg
19,240 Nightly
16,102 Dally 6.80p.m. to midnight 10,304 Daily 7 pm,
|17,280 | Daily 8 pm to midnight
17.761 Sundays 7 pm3 & midnight 18,404 Enah afternoon.
19,220 Daily 430-7 p.m.
18,851 Daily à 8.5.
21,640 Not regular
[Allowance must be made for "summer-time" in most Eure-
pean countries, which is one hour ahead of true time.).
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