820 
WV 
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Two PLY VYe“pia.x ¥4 THICK 
EACH. 
OUTER ELECTRODES 0-25" 
THICK STEEL. 
RECORD ée2. EDGE ON CENTRAL ELECTRODE 
p 0:-001IS” STEEL. 
WV WAVAVATA AVA IY AVRTAVAY AAV AVE AA UAYAYIVATRYA AAT 
RECORD 3. FACE ON 
RECORD 4 EDGE ON 
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SINGLE PLY GAUGE Ye"DIA. 
x Va" THICK. 
ANNEALED COPPER 
ELECTRODES O'O22"THICK. 
EDGE ON 
GAUGE FACE PARALLEL 
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WAVAVAVAVAVAVAVAYAVAVAVAVAVAVAVAVAVAVAVAYAVAAVAVAVACAACAG 
EDGE ON 
GAUGE FACE PERPENDICULAR 
RECORD © TO WATER SURFACE. 
VW WAV 
ELECTRODES CEMENTED WITH “GELVA. 
INSULATION: LAYER OF TELCOTHENE AND 
3B LAYERS OF RUBBER TAPE. 
1V4 LBS. TNT. STANDARD CHARGE. 
