Table 3. Continued. 



Operation 



Test 



No. 



Site 



Date of 

 Installation 



Geographic 

 Location 



Water 

 Depth 



(ft) 



Subbonom 

 Composition 



Fluke 

 Type 

 (ft) 



Charge 

 Weight 

 (lb) 



Actual/Predicted 

 Gun Barrel 

 Pressure (ksi) 



Penetration 

 Depth (ft) 



Projectile 

 Velocity 

 (ft/sec) 



Holding 

 Capacity (kips) 



Comments 



Type of Soil 



% 



Before 

 Keying 



After 

 Keying 



Pullout 



No 

 Puilout 



IX 



28 



North of 

 Anacapa 



6 Dec 1974 



34°OO'30"N 

 U9°24-30"W 



60 



Cemented 



rock 



conglomerate 



100 



3 

 (rock) 



3.75 



-/2S.00 



" 



easured 



395 







1, The open socket attached to the fluke was fractured 



apparently by the piston when it ejected prematurely. Future 

 rock flukes will be modified to prevent this by welding the 

 main plates at 180 deg vice 140 deg. 



29 



North of 

 Anacapa 



6 Dec 1974 



34°00'30"N 

 119''24'30"W 



60 



Cemented 

 rock 



100 



3 

 (rock) 



3.75 



-/28.0U 



not measured 



395 



30 





1. Fluke embedded in an uneven seafloor with large, partially 

 cemented boulders. 



X 



30 



SEACON 1. 



Santa Barbara 

 Channel 



25 Feb 1975 



34°17'12"N 

 119''42'47"W 



600 



Sand 

 Silt 

 a ay 



20 

 64 

 16 



1-1/2 X 3 

 (sand) 



3.60 



-/32.00 



not measured 



380 



- 





1. The fluke Unkage was fractured; the exact cause is 

 undetermined. 



31 



SEACON I, 

 Santa Barbara 

 Channel 



25 Feb 1975 



3401712-N 

 119°42'47"W 



600 



Sand 



Silt 



Clay 



20 

 64 

 16 



1-1/2 X 3 

 (sand) 



3.60 



-.'32.00 



24-26 



20* 



380 



28 





1. The anchor performed satisfactorily: however, a larger {2 x 

 4-ft) fluke could have been used for improved perfomiance. 

 Available soil data to 10 ft indicated a much higher strength 

 soil at 20 ft; this trend was false. As a result, the small fluke 

 was chosen. 



2, No damage to equipment. 



32 



SEACON I, 

 Santa Barbara 

 Channel 



26 Feb 1975 



34°17'12"N 

 119°42'47"W 



600 



Sand 



Silt 



Clay 



20 

 64 

 16 



2x4 

 (clay) 



3.20 





no fire 









1. System did not fire; a new, reusable arming device was used, 

 and it malfunctioned; a slight leak occurred by a shear disk, 

 and the disk did not properly rupture. 



XI 



33 



Coronado 



19 Mar 1975 



32''39'N 

 1I7<>10'30"W 



48 



Sand 



overlying 



rock 





1-1/2 X 3 

 (sand) 



3.50 



-/29.40 





easured 



366 





asured 



1. Anchor used in an amphibious operation; not intended for 

 recovery. 



2. Sediment fluke fired into rock ovcriain by shallow sediment, 

 and the fluke was damaged; sediment thickness was not 

 sufficient for fluke keying, The linkage did not break, and the 

 fluke was recovered. The installation barge was erroneously 

 placed over a rock ledge. 



34 



Coronatlo 



19 Mar 1975 



32°39'N 

 117°1030"W 



49 



Sand 



overlying 



rock 





1-1/2 X 3 

 (sand) 



3.50 







fire 









1. System did not fire; the new, reusable arming device mal- 

 functioned. A procedure, which did not properly check firing 

 pin clearance in its firing chamber, was used to improve the 

 safety margin for firing in shallow water. This procedure has 

 been modified, and additional bench testing of this reusable 

 system has been performed. 



35-36 



Coronado 



20 Mar 1975 



32°39'N 

 U7°10'30"W 



55, 52 



Sand 





1-1/2 X 3 

 (sand) 



3.50 



-/29.40 





easured 



366 



■ ■ 



asured 



1. Anchors used in an amphibious operation. Flukes were proof- 

 tested by pulling with the warping rug. After the operation an 

 attempt to free the anchors was made by rapidly jerking the 

 anchor line; neither anchor could be pulled free, and the lines 



2. A larger 7/8-in. wire was used in place of the 3/4-in. wire to 

 fully develop the sand fluke capabilities. 



'Estimated from Key Dis = 1-3/4 x fluke length. 



