The Honolulu republican. [volume] (Honolulu, T.H.) 1900-1902, 1901-11-27
Electric Signals fsr warships.

ElecNic signals f5r Warsnips-
To what extent wireless telegraphy
is being made use Of on ships OF wa
may BE- gathered from the United
States Naval Annual Notes on
Naval ProgI ess. Just issued
among other things the experts OF
thu Intelligence Office state that dur
ing the early development Of wireless
telegraphy IL vas soon realized that
its use would be largely for maritime
and military purposes.
The engineers having the matter n
charge then proceeded with this idea
in view and have perfected their in
struments for Communication be
tween ships, between ships and light
houses and stations on shore, and be
tween islands where the laying Of a
cable is difficult operation. II is Of
especial interest to naval officers. ov-
ing 10 the success with which long
distance communication has been
maintained over the water, its great
possibilities for navigating purposes
and for use on scouting vessels and
its independence OF weather. fog.
snow. rain or darkness. Great prog
ress has been made during the last
year, mainly in the following points:
% Turned and multiplex wireless
telegraphy (2D Increased distance
over which messages can be trans
mittcd
One of the great disadvantages for
naval purposes has been that privacy
OF messages could not be maintained.
nnA IN
be rendered upintelligible by working
another transmitter within the field
OF the waves. Mr.. Marconi claims TO
have succeeded in tuning his receiy-
ing instruments so that they respond
only to tuned transmitters. To prove
the success OF his system, two mes
sages We're sent from St. Catherine
Point. one in English and one in
French. The receivers at Poole were
connected TO the same air wire. about
80 feet in length. aid each rolled out
the message on its tape that in Eng
lisa on one and that in French on the
other. While these experiments we're
being carried out. others for the Brit
ish Admiralty were taking place be
tween Portsmouth, and Portland.
These lines OF communication inter
sected each other. but no interference
or confusion Of messages resulted.
When the German squadron after
its trip out 10 China. arrived on one
OF the ports. the British Admiral there
sent a wireless message for a board
ing officer to visit the German flag
ship and offer the usual civilities
Upon the boarding officers arrival he
was Informed by the German officers
that the message had been read. On
another occasion the officers of an
English ship were surprised. while
experimenting in the Med'terrauean
to recstve message in Italian asking
as to the position of the ship The
message came from an Italian man-of-
war, and its receipt and the intercept
ton of the message mentioned above
show the importance of tuned in~tru-
ments for naval purposes. All OF
these ships were supplied with the
older form of wireless apparatus and
were unable TO preserve secrecy.
These difficulties are now practi-
caliy overcome. and the extension of
the use OF various wireless systems
amounts to an exciting race between
all the navies and the commercial
lines. Among the foreign Govern
ments which are establishing systems
or contracting for apparatus for naval
use are Chill Denmark. England.
France. Russia Germany, Italy. ia
pan. Spain and Sweden.