PART in BRITISH UNDERWATER ORDNANCE CONFIDENTIAL TABLE OF CONTENTS PART I I I - BRITISH UNDERWATER ORDNANCE CHAPTER 1 BRITISH INFLUENCE MINES Page Mine Cftart (Tuble 1) .......................................................................................... 2 In trod u ction ......................................................................................................... 3 "A " Mark I (" A " Mark I I , I I I and IV ) .......................................................... 5 A A « MXA n Mark V T .............................................................................................. "A" Mark V T T ........................................................................................... •nut*• U flrlf V t i r k T T ............................................................................................, "M" Mark I l l ...................................................... CHAPTER 2 BRITISH CONTACT MINES Mine Chart (T a b le 1) .......................................................................................... 2 In trod u ction .......................................................................................................... 3 H I I Murk I I ........................................................................................................ 5 •*T" Mark I I I ......................................................................................................... 9 V ickers Antenna .................................................................................................... 11 Murk XIV (Mark XV, XVI and X V II) ................................................................. 15 Mark XIX ................................................................................................................ 21 Mark XIXs (Mark XXVII) .................................................................................... 25 Mark XX (Mark XX*) ............................................................................................ 29 Murk XXII (Mark X X II*) .................................................................................... 33 Mark XXV ................................................................................................................ 37 CHAPTER 3 BRITISH TORPEDOES Torpedo Chart (Table 1 ) .................................................................................... 2 Warhead Chart (Tablo 2) .................................................................................... 4 In trod u ction .......................................................................................................... 6 21" Duplex Impact-Only Exploder, Mark I and I * * .................................... 7 C.C.R. E xploder, Mark I and I * * .................................................................... 11 18" Duplex E xploder, Mark I (Mark I I ) ........................................................ 13 Above-Water Sxplodor .......................................................................................... 15 Exploder Churt (Table 3) .................................................................................. 20 Type 3 E x p lo d e r .................................................................................................... 21 CHAPTER 4 BRITISH DEPTH CHARGES Depth Charge Chart (T a b le 1) .......................................................................... 2 In tro d u ction ......................................................................................................... 3 Mark V II (Mark V II * , Mark X I I I ) ...................................................................... 3 Mark V II (Heavy) .................................................................................................. 5 Mark V I I I (Mark X I, X I * ) ................................................................................. 7 Mark X (Murk X *) .................................................................................................. 11 Mark X II .................................................................................................................. 15 Pistols Mark VII, VII*, VII*A, VII**, VII**A, und VIII ...................... 17 Pistols Mark VIII*, VIII**, VIII***, IX, IX*. IX**, IX***, XI, X I*, XI*C, and X I II ...................................................................................... 19 P is t o ls Mark X IIIA , X I I I * , XIV, X IV *, XV, XVC ........................................ 21 P is t o ls Mark XVI, XVI*, XIX, XX, XX*, XXI ................................................ 27 Primers (Boosters) Mark VII, VII No. 2, V III, VIA, X .......................... 27 Primer Plucors (Booster Extenders) Mark I & I* ...................................... 29 CHAPTER 5 BRITISH DEPTH BOMBS Depth Bomb Chart (T ab le 1 ) .............................................................................. 2 Depth Bomb Fuzes (Table 2) .............................................................................. 2 In trod u ction ............................................................ ............................................ 3 Nose Fuze #32, Mark3 I I * and I I I .................................................................. 9 T a ll Fuzes #895A, Mark I , #875A, #8?5B and #875C .................................. 11 T a l l Fuzes #862, Marks I and II ...................................................................... 11 Added 1 July 1945 (Change No. 8) -1 1 - COHFIDENTIAL TABLE 07 CONTENTS PART I I I - BRITISH UNDERWATER ORDNANCE CHAPTER 6 BRITISH AHEAD-THROWN ANTI-SUBMARINE WEAPONS Page In tro d u ction .......................................................................................................... 3 Hedgehog .............................................................................................................. 3 Squid ....................................................................................................................... 3 CHAPTER 7 BRITISH CONTROLLED MINES L Mark I (L Mark I I ) .......................................................................................... 3 Added 1 July 19^5 CONFIDENTIAL - H i - (Change No. 8) PART n BRITISH UNDERWATER ORDNANCE CHAPTER 5 BRITISH DEPTH BOMBS ✓ DECEMBER 1. 194-4 CONFIDENTIAL 5 R IT IS H DEPTH BOMBS , B ritis h T o tal Type & Shape Max. O verall Fuzing Markings Status Desig­ Weight w t. o f Dlara. Length nation ( l b s . ) Charge( lbs.) Nose ( i n . ) MJc. I 100 45 KDX/TNT Round 8.05 42 Nose Obsolescent or Fuze DarX green 49 Torpex # 32 o v e r a l l , i " MX. I I 100 It It It It 1" from II 1 M N It It If MX. I l l 100 " " light^reen band 6 MX. IV 100 « It It II T a il from nose. 11 P ls to la E arly d e­ *28 or signs, #30 yellow o v e r a ll. MX. VI 100 ii Sec II See II S ervic e Note 1 Note 1 MX. I 250 149 Bara to 1 Round 11.2 59 Nose Obsolescent or Fuze 140 TNT- # 32 Same as 100 lb . MX. I I 250 !« II II II II c la s s , It MX. I l l 250 It It It •t ft that light II green band It MX. IV 250 154 kdx/tnt 11.35 58 T a il is 4£" S ervice 152 TNT P is to ls from nose. #28 or #30 MX. I 500 291 TNT Round 14.0 74 Nose Obsolescent Fuze # 32 Same as 100 lb . MX. I I 500 It It It •1 « class II o r / * a n t n •1 II MX. I l l 500 508 Baratol 14.3 76 that lig h t sreen Dana It •1 II MX. IV 500 282 TNT 72.5 T a il is 6" Pl3tO l3 from nose. #28 or #30 Me. I 600 432 Mlnol Concave17.5 56.7 T a il Same gen­ S ervice 439 Torpex Fuze e r a l mark­ 1 if 0*? ings. Note - 1. Attachment welded to nose to prevent ricochet. Increasing the overall length of 42 Inches by several inches. Table 1 - B r itis h Depth Bombs B r itis h Location F itte d in Means o f Means o f Max. Length Status D esig­ the follow­ Arming F irin g Dlam. nation in g bombs No. 32 Nose MX. I,II,III Air vanes. Impact 2?5 7'.'0 Obsolescent. Fuze s e rie s . 200 f t . a t w ith de­ 100 m/hr. lays o f 0 .5 ,1 . 0, 1 . 5 , 2.0 seconds. No. 30 T a il mx. r r, v i A ir vane. Impact 2?0 3'.'88 Service. # 28 P is to l S eries. 13 revo­ with de­ is for land No. 28 lu tion s lays up bombardment. P is to l to 11 3CCOnd3. No. 862 T a il Mk. I Arming Hydro­ 2?0 5"5 S ervic e. Fuze 600 lb s. w ire w ith ­ s ta tic drawn. Pressure 30 f t . depth. No. 875 T a ll Mk. VI 100 lb . Arming Hydro­ 2?13 4V75 S ervice * 895 Mk. I 600 lb . w ire w ith ­ s ta tic 895 is re ­ Fuzes drawn. Pressure. placing 875. Table 2 - British Depth Bomb Fuzes and Pistols CONFIDENTIAL -2 B RITISH DEPTH BOMBS Introduction I. The British employ four sizes and types of depth boobs: (a ) 100 lb . Marks I, II. HI . iv and VI (*) 250 lb . Marks I, II. III and IV. ( c ) 500 lb . Marks I, II. III and IV. (d ) 600 lb . Mark I. 2. Service depth bombs are ordinarily fuzed In the tall only, although earlier models, now obsolescent, employ only nose fuzes. In rare cases, both nose and ta ll fuzes may be encountered. Two methods are employed to obtain depth firing: (a) Delay firing detonators and powder trains. (b) Hydrostatic fuzes. >. All service depth bombs are painted dark green overall although earlier models are painted yellow. A 1" light green band Is painted around the nose just abaft an 0'.'5 red band. k. The bomb cases arc either cylindrical with round ends or tear-drop shaped, and are fitted with the standard British single suspension lug on the top center line. The 600 lb. Mark I may also be fitted with double suspension lugs for use with U. S. aircraft. 5. The tall sections for these bombs consist of a cone fitted with four fin s mounted r a d ia lly a t 90° to each other and enclosed In a cylindri­ cal shroud. On these