The Hays free press. [volume] (Hays, Kan.) 1908-1924, 1914-10-10
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be turned from port to starbOard- Of course,
there would be for the apparatus except
in dark, stormy or foggy weather unless it was
to be used in communicating with other ships
If the perfectly clear the blasts sent
out would be recorded at the very instant of
their production, but no echo would be produced
But if there should happen to be object of any
considerable size at a distance greater than
two three miles the zigzag line the paper
would be changed, the amplitude of the waves
would be greater and would be very noticeable
To make sure, the blasts could be repeated sew
eral times; and then if the result always the
same, it would indicate the presence of some OBJ
ject, and the length Of paper between the primary
blast and the echo would indicate the distance
that the object from the ship. 1t might be
so arranged that one inch of paper represented
a mile
To many it will appear difficult to reveal not
only the presence of objects sea- but also their
size, distance and character, by simply sending
out vibrations and receiving echoes. Sir Hiram
assures US, however, that such echo properly
received and recorded will not only indicate size
and shape with a fair degree of accuracy, but
direction and distance with great accuracy 1t
will distinguish a ship from iceberg, will show
whether the object is stationary or moving, and.
if moving, the direction and velocity of such
movement.
Let embark, in imagination, on a ship
equipped with Sir Hiram's invention. We
well out at sea, ship making 20 miles
hour, and find, upon sending out several
blasts that the echo reaches US in 20 seconds.
We infer that, it took ten seconds for VI
>brations to reach the object and another ten
onds for the reflected vibrations to return, the
distance is slightly over two miles One minute
later send out another blast, but the result is
stronger than before, change the direc-
ton Of the blast and find that the greatest effect
is produced when the blast is sent out dead
ahead; Also that the distance between the object
and ship is being reduced at the rate Of 35
miles hour. nasmuch ship is making
only 20 miles an hour, # is evident that the
known object is ship making Is miles hour
and travelling toward slightly to star
board.
Our next blast shows that the ship is only
mile distant, and very much to the starboard.
We follow her direction and when she is in a
position to present her broadside to u.s. we find
on sending out a blast that the echo is very
strong the bells at the receiver ring violently and
the recorder makes large and distinct marking
on the paper strip. The weather has been so
thick that have not seen the ship but we
have fair idea of her; know her speed and
we receive series of records from each blast,
showing that there several small objects in
vicinity, probably fishing boats. We are able
to locate them and measure their distance and
If any of them dead ahead of US, we change
direction TO give them a wide berth.
Subsequently we have a new experience. We
send out blast and receive back an echo show
very nearly dead ahead of We know it is
large, because the distance indicated is ten miles
and the record quite distinct By sending out