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| U.S.N.B.D. - BRITISH LAND MINES AND FIRING DEVICES |
| DEMOLITION CHARGES & EXPLOSIVES |
| NAVAL EXPLOSIVES |
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I. |
DETONATORS: |
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Six standard service detonators are presently in use by the British Navy. Five are authorized for shipboard use, but the No. 21 and No. 25 are classed as obsolescent and are being replaced by the No. 6 Briska detonator. |
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DETONATOR |
TYPE |
MATERIAL |
EXPLOSIVE |
EXP. WT. |
REMARKS |
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No. 21 Mk VII |
Electric |
Copper tube |
ASA/CE |
33 grains |
Obsolescent |
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No. 25 Mk II |
Non-Elect. |
Copper Tube |
ASA/CE |
33 grains |
Obsolescent |
| No. 6 Briska | Electric | ASA/RDX | 15 grains | Painted red | ||
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Mk II |
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* |
No. 6 Briska | Electric | ASA/RDX | 15 grains | 36" leads | |
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Mk III |
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| No. 6 Briska | Non-Elect. | ASA/RDX | 15 grains | |||
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Mk II |
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| ICI Gasless | Electric | ASA/CE | 1 sec delay | |||
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Delay, No. 1 |
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* |
The No. 6 Briska, Mk III is identical to the Mk II, execpt that it has 36" wire leads. It is issued for limited use in salvage work and is not supplied for general Naval ser-vice. |
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II. |
PRIMERS: |
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A. |
C.E. Primers for Shipboard Use: |
| 1. |
Mks I & II: The Mk I primer consists of a waterthight cylindrical brass case, 2.25" x 1.18", containing 1-1/7 oz. of C.E. The Mk II is identical to the Mk I, except that as a wartime measure a paper wrapper has been substitued for the brass case. The Mk II is not waterproof, but may be used under water provided immersion does not exceed one hour. |
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| 2. |
Mk III: This primer is identical in dimensions and weight to the Mk II (above) but the detonator recess is of smaller diameter to fit the Briska No. 6 detona-tors and the ICE Gasless No. 1 detonator. |
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B. |
Polar Blasting Gelatine Primers for Shore Demolitions: |
| 1. |
These two primers are plastic, and thus have no recess provided for the deto-nators. The primers are paper wrapped in cartridges, dimensions and weights as follows: |
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Primer |
Dimensions |
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2 oz. Primer |
2-1/4" x 1-1/8" |
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4 oz. Primer |
4" x 1-1/4" |
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These primers are for shore demolitions only and are not for shipboard issue. |
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