Value for 



Dimension 



Length, ft (m) 

 Width, ft (m) 

 Thickness, in. (mm) 

 Weight, lb (kg) 

 Area, ft (m ) 



Coral/Sand Fluke 



5.5 (1.66) 

 2.7 (0.81) 



1 (25) 

 900 (408) 

 12.5 (1.15) 



Sand /Clay Fluke 



6.7 (2.04) 

 3.3 (1.02) 



1 (25) 

 1,250 (567) 

 21.5 (1.99) 



The dimensions of the piston are given below: 



Dimension 



Length, in. (mm) 

 Outside diameter, in. (mm) 

 Inside diameter, in. (mm) 

 Hollow length, in. (mm) 

 Weight, lb (kg) 



Value for Piston 



34.5 (876 

 10 (254) 

 5.4 (127) 

 25.4 (638) 

 700 (320) 



The piston is hollow, to accomodate the cartridge; the lower end is 

 fitted with an eye for connection to the piston retrieval line and 

 retainers to maintain proper alignment during firing. It bears against 

 the rear of the projectile, shown in Figure 5, with a peak force during 

 firing of about 2 million pounds (9 MN) . 



The projectile fits below and is driven by the piston. It may be 

 designed for hard coral or other rock, soft coral, dense sand, or 

 softer unconsolidated sediments. For all but the hardest rock, projectiles 

 are constructed from 1 -inch-thick (25 mm) high-strength steel plate. 

 The basic design is a flat anchor plate with a backbone plate to provide 

 strength during installation and service and an eccentric point of 

 attachment to force keying (rotation toward the horizontal) . For hard 

 rock, a design similar to that proven effective with the CEL 20K Propellant 

 Anchor in basalt would be used. The projectile assembly is secured in 

 the launch vehicle by tie rods. The lower ends of these tie rods are 

 attached by shear pins through small holes in the rear of the anchor and 

 backbone plates, and the upper ends extend through holes in the barrel 

 dragplate and are secured by nuts atop the drag plate. 



Lines 



Lines are connected to the projectile and piston and are faked in 

 figure-8 loops around timber pads on the bottom of the launch vehicle to 

 allow rapid payout as the projectile assembly is launched downward. The 



