Evening star., 1925-05-03
Army and dNavy News
Bv NJ. H. Mcintyre.

Six Coast Artillery regiments are
being equipped with the eXponential
horn, which is the first step forward
in providing antiaircraft units with
a suitable sound-locating device. Pre-
liminary tests made of this device,
which is being used as a basis for
this apparatus, indicates that the eX-
ponential horn will not only give a
range of about eight miles in the
daytime, but that it's accuracy will
be a great improvement over that of
the Perrin telesitemeter, which Is
considered to be the best listening
apparatus known.
Ens six regiments which will re-
ceiVe sound detectors and which Will
conduct these tests some time this
month. with the number of detectors
indicated, are: Sixtieth Coast Artil-
lery. Philippine Islands. two; 61st
Coast Artillery. Fort Monroe. Va,
three; 62d Coast Artillery, Fort Tot
ten. N. Y, four; 63d Coast Artillery,
San Francisco, Calf, three; 64th
Coast Artillery. Hawaiian Islands,
three. and the 65th Coast Artillery,
Panama, three.
For night firing the Ordnance De
partment has provided improvised
lighting systems for the r. A. cor
rector, using storage batteries, and
also a lighting system for the ali
meter, model of 1921.
Intensive work has also been inaug-
urated on the development of suitable
anti-aircraft machine gun sights
The sights developed have been tested
by the Coast Artillery Corps. and one
of them will be satisfactory for is
suance to the service as soon as GER
tain minor changes, suggested by the
Coast Artillery Board. are incOrporat-
ed in its design. Orders have been
given for the construction of IS of
these sights, which will be placed in
service Immediately, and it is posi-
BILE that this number will be increa sed
10 SO.
A well known manufacturer Of
ordnance material has produced what
appears to be a very satisfactory
anti-aircraft computer, which can be
used for either case or case 8 firing.
This device includes the follow-the-
point data-transmitting device. with
the exception of the data-transmit-
Wing device. It is entirely mechanical
In operation and is of very rugged
construction.
That the procurement plans Of the
War Department supply branches
may be given a thorough test war
games will be held this week begin
ming tomorrow and concluding MAY
=, in the respective offices of the
participating bureaus. The seven
branches of the service participating
in this procurement test are the Quar-
termaster Corps. Signal Corps, Ord
nance Department. Air Service, Medi.
cal Department, Corps of Engineers
and the Chemical Warfare Service.
The games will be held under the
supervision of the Assistant Secretary
of War, who is charged with mobiliz
ing the industrial power of the Ma
ton.
The seven branches will be given a
general problem, the solution of which
Will deal with procuring of sup
plies pertaining to their respective
branch of the service. The war plan
ming sections of the various War De
partment branches have for a consid
cradle length of time been engaged in
comprehensive study of the procure
ment requirements of their respective
branches, and the war games which
Will be held this week are the acid test
as TO the feasibility of applying the
methods which have been worked out
in this study in solving any problem
which might arise. The week will
represent the first so days of war