- MAY 4 1927
0 . N. I. Publication No. 36
NAVY DEPARTMENT OFFICE OF NAVAL INTELLIGENCE
I'
JUNE, 1918
WASHINGTON GOVERNMENT PRINTING OFFICE 1918 --- ' II I I \ ' I ' II I --1 I r I :\lOST CO~FIDENTIAL.
t · :-;1T E1> :-iT.\TE:,; :\.\ Y.\L F oBcE:-. On:H.\ T1:--1; 1:-; 1-: nwn:Ax \YATEHi'-. t ·. :-i. :-i ... \h~J.Y I LLE ... FLAC; S HIP, 1/11,,, Si.r . .l farch .39, 1918. Frn111: 1:111"<'1' ( 't1111 11 1:1111kr. Tt1: t ·nit,·d :-it:1t1•:- lk:-ll't1_\·1•r Flntilin..; opn:1t111_g i11 Eun>pt>:u1 11·ilt t'I':-. :-iu i>jl'l'l: l)q1th l'h :1rg,· t:11·til',.
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GE:\"ERAL l -'STRl TTIO:\" S.
,, :-i u i1111:1r;11,•·,_ 1111 ·:111 ,-p,·1·d i, :1:-:-11111,·d ;1..;, ~ k111>h. :-i1 il n11:1ri111· will pr,d1:il 1I_\· ,1il>111t·q:,· :11 IH •,t 'IH't•d t, , 1.·,11 ' " ·..?llll f, ,,,1 . t:1ki11g a11pr11:-.i111:1t1•l.1· t1Y ,i minutes, tlH'I I 11·il! p; ·11 l1,d,l _1· 111:1k,· l,111· ,p,·1·d II> :t \ 11i ,I l,, ,i11:: pi,·Lt·:I llj l h1· li,t1• 11 i11 _g c1 .. 1-i (·1•,.;. MOST CONFIDENTIAL \! 1" .111 --p,·,·, 1 ,,r ,J,.,1,·.. _11•r ''"11111,·tl ,, , 211 k,1.. 1- . 'l':ll't il':il d :11:1 "f ,1)(•1 ·i1111·11 1·11n·,,, t:1kt•11 !'1·11111 l•:ri,·"11 11 ·, 1·11n·,,,. NAVY D EPARTMENT ' \\·l1 1• 11 ,.,,. .. tl1·,tr111·1·r, :11·1· ;11·,1il:1 h l1 · fill' .1 1tn1 ·ki11g ,11li 11 1:1ri1 11• . tlt1 • 1;r,-t ntt :1l'i,i 11 g d 1•,- \rnypr ,.;h ,1uld turn with OFFICE OF NAVAL I NTELLIGENCE, ;\ I i1•\\' () r :il l,, 11·i 11:.: -. 1• :·1111,I ;1(t:1 l'ki11g d ,•,t r11_1·1•1· 111 r:•,ll' li p() ill t 111' ,.;u l,1111 ·t)!t'l1('(' i11 k:1 ,.:t po,.;;:ihl,, t.in1t' nncl with Washington, D. O., June 3, 1918. 11•,1,,,1 111:11 11•11 1·1 1·i11 :.:_· 111 ·1•,•..;,-:1r_1·. 11r111·i d(•d t l1:1t fir..;t tl1 •,-ti·11_q•r 11·ill 1111t lH· dPl:in•cl in l'(':1l'hillg point nf suhmprgence. . By direction of the Chief of Naval Operations this information is printed for the guidance of vessels of the Umted States Navy. L,,i r::; t d1·., 11·111·1•r , h()11l,I i111 111 1•di:1 1,•h· i11di1·nt1· 11·lii('h 11·:11· -.lw 11·ill t11r11 h1· ,-()u11d i11 g lwr whi:-;tit-. Olll' hlnst for s larl111ard a;1d 111·11 hl:1,-1, 1'1,r 11()r; _ T l11· ,ig11nl ,- li r111 lil 111• r1•p1•:1t1 ·cl lwi, 11·1· ,1rri1·i11 g :it ,- uhmnrill<'·s point of ROGER WELLES, :-ti Ji lll('l';.!'t•f 11·1•. Captain United States Navy, .\ l1u1n · ,-l11111 ld Ii,• tltrm1·11 1,1·1•r Ii_,. fi r,-t
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PLATE " A."
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PLATE "8."
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2 CASE II.
Showing pmsuit curves of two destro. yers when first destroyer turns to left after makm. g pat t c•rn of four charges. . . , lw !lfls Second destroyer drops several charges before turning to left in order to cut off submarine ca:--i . ,.:,-:i -: t 111 ~ attempted to reverse her course. Buoy dropped by first destroyer at point of submergence will g: n',111 ·' ' 1 second destroyer regarding distance to be passed abeam. . ,,·t•r N h b h ote t at ot destroye rs are free to manceuver wit out anger rom dept c arges. - should finish run near center of other's circle. . h d f h h l•~,•1ch dc•,;t I (.
CASE III. Sh owmg· pursw•t curve and charges dropped by one destroyer when fitted with a deptI l c h ai•ere 110, t , .other1· t Z• l'I". Note that first foUl' howitzer charges are fired on that side away from which destroyer turns a 0 _J __j 01 , ...... (. Ot//. ''''"'-'''~,.....77/7.T~----·/S .P. - Ci) C J:l :,> fe. ,1/. fu/)/J?c2 rl,1e {JJeed 72 11/lOi.f II Sc.<1, e/'2 = /oo_, v /a/s ,, ., _v .. .J L.7 c-' e clS 1 ~ e .,L'/, >• _, S- ( (:1 / / '-' F , I ' p I c I \ ,, 11 11 I ' ·:x. -~ • 'I::.) -z --:... < :z ~ C: \:::::: -i ---, m 1"rj V) -- (.J') c:,~ c.:: V)- --- OJ ~ ~ Q'J' ~ -....< ~ ..h .:z-- ~ ""1 ' . ---.t__ ------,, B" / ,,--I ....._ / I ' ' - _ ~ ______I S.SEC- 2 0 k'NO I ~oo• -----T S, / _,_ / .... I ' / I \ ,- _ ___.__ - I -- ' I ~--- \ I I: 1 '\ l-.70' I '...... ,. )( r------ a(, ;I I I .2o SEco/"IP INTf L ...... RYALS / - I I ' \ I I _ _:..I _ - - • \ \ I -- ._J,K:--~ \ I I 1 '- ~ 70' I ' / ~ \ \ .I \ \ I I --- f I I I I I I I I - - ·- IN -- 5u~MlRQfNCE -,- ----,- \ \ \ \ \ \ \ '\ \ \ \ \ \ \ \ \. '\. "" " " " " ' ..._ ---- .,,,,,.....--- _... ------...... --~ - -- -..... ', / ~, -- .,,,,. ER SE TO ·1-o~R Ubl>f R ;:,. . . \ ...... o.s,.,.. ,. 'o"' ,../ · --- ' ' ~l'yl) / ' / C'o -l)ECLASSI rme--, __ ::~ C ~ 01 , -----1 \ . "\ -~ '\) \ \ \ \ '\ \ \ \ l). \ U \·~ ' :i ':1,_ ,~ I~ 'I~ I~ ~--- I 1Cl) ,t C f V> I c, le, tmC 11 ·l ,~ J:, h, 151 f:IJ... -- - - ,- /< /< ,~ I 1" '\ ,"' \ I , I' ~ \ I I \ \ / I I \ \ / I I \ / \ / I I \ ,, \ .... ,, __ ..,,, I I \ I \ ,,,,.. \ -- ..... -- ... I \ \ I L. \ ' ' \ ' \...... "" ..... " Sc.RLE i '' = 100Yos• . " ' " ' • TrPE ··o ,. DEP.TH CHf\RGE5 , • How1rzER 'PR01ECT1l.Es