Evening star. [volume] (Washington, D.C.) 1854-1972, 1927-12-20
NAVY RECEIVES MANY PLANS
FOR RAISING OF SUBMARINES
Practically All Suggestions Have Been
Tried, But Found Useless: Diff
culties Explained.

not be in one OF the compartments
which is flooded and which prevents
the vessel from rising 10 the surface
Mess one Of the internal cOmpart-
ments Of the vessel is flooded there
appear ~ to be- only a very remote pos
SihilltN Of the vessel being unable 10
rise to ihe surface DN the expulsion
Of Mailer from The ballast tanks either
bN compressed air or BY pumping
since All submarines are equipped
with reiabio pumps and ia addition
are provided with = large storas 81
ca pa city for compressed air Unless
the compressed air in the compressed
air storage system is amply sufficient
to bring the vessel 10 the surface. the
vessel is ny Navy regulations. for
hidden TO dive'in time of peace the
bureau points out.
Marker Buoy Proposal.
Turning to the propose OF marker
buoNs fot indicating the position Of
suuken submarine. the department
says; such buoys. equipped with tete
+ phones and. in ma ny cases, with cleo
tric lights and reiea So BILE from the
coutroi room of the vessel. were al
one Time installed Ia ali submarines.
owing TO the danger OF THEN acct
dental release due TO the shock of
depth charges OF To other causes
marker huoNs We're removed from ali
/ submarines during the World War
In connection with the provision OF
marker buoNS. it should be noted that
unless the ma rkcr buoy Gao he de
tached from one of the comps II mentS
of the submarine which is not flooded
ii is Of no value II should also be
noted that tine Bureau of ConStruc-
ton p nd Repair is already IN posses
sion of plans Of a successful type OF
marker buoy equipped with tele-
phone and an electric light.
In the case of Thesis however the
location of the wreck il known. one
Of the most common teii-taie signs
being the oil stick and the presence
of oil bubbles The Stick en3 bled
divers 10 know where 10 begin opera
tons 10 reach the craft.
The depa rtment says that the ne
/ ceSSiIV for an emergency air hose in
connection with the marker bttONs or
special buoys has not been apparent
in view or the large quantity of com
pressed alr and oxygen which Is
ia bit lv carried bN all submarine
ProVis iou has sn been made on all
submarines for supplying air To q
sunhen Subma riue both for brea thing
! and salvage purposes. This is accom-.
pliShed by means Of number OF
valves on the exterior of the hun to
which the diver may attach sir hose
the valves connecting 10 systems Of
internal piping leading TO all ma N
compa II meuts of the vessel
Drop keels or detacha bic weight :
ga pa bIe of being released from within
/ the vessel in an emergency TO reduce
the fixed weights Of the vessel TO com.
lenSate for Ioss Of huoya ncN the de.
part nenJ points out. we're fitted on
some of the "a rlier subma rines Of the
Navy.
These devices have the inherent
disadvantage Of reducing The stability
OF the vessel when they are released
and unless he vessel has been very
carefully designed their release might
result in disa ster rather tina in bene.
nj, officials declare. They further
involve considerable sacrifice in
weight which must be carried al all
times and which might better ha We
+ been utilized in adding TO the mill
! tary features Of the vessel OF to the
: comfort of the crew For these rea
/ sons the provision OF drop keeis or
4 detachable weights has not been
j looked upon with faNoa Special
. tanks known as safety tanks which
form part of the ma in ballast sVS
ten and which are designed 10 he
hiown Al great depth. have been fitted
! on certain sIIbma rines and perform
the same functions without the dis
adva ntages -