retrieving buoy 



beach gear ground leg 



embedment anchor 



Figure 3. CEL 20K anchor; salvage usage in competent seafloors. 



Major Components 



Sediment Fluke Assemblies. Three flukes are 

 used to optimize performance in seafloor sediments: 

 one for sand and stiff clay (1-1/2 x 3 feet), one for 

 sand and medium stiff clay (2x4 feet), and one for 

 soft clay (2-1/2 x 5 feet). The fluke sizes and shapes 

 were devised through theoretical and experimental 

 investigations [6] . Their characteristics are detailed in 

 Table 2. 



All sediment flukes are of bent plate con- 

 figuration with nominal length to width ratios of 2. 

 They are designed to key or rotate rapidly from the 

 vertical to the horizontal position when an uplift 

 force through the anchor downhaul cable (pendant) is 

 applied after completion of penetration. The keying 

 action illustrated in Figure 6 occurs in a vertical 



distance of 1-3/4 x fluke length, measured from the 

 fluke tip. Figure 7 shows a sand fluke assembly in its 

 penetrating position and in its keyed position. There 

 is no rigid mechanical connection at the point of con- 

 tact between the fluke and piston; during penetra- 

 tion, these components maintain contact through a 

 combination of inertial and drag forces. 



Rock Fluke Assembly. The rock fluke assembly 

 consists of a fluke and piston; its characteristics are 

 listed in Table 2 and illustrated in Figure 8. The 

 original design [6] utilized a three-fin arrowhead con- 

 figuration consisting of 100 ksi 4140 steel for the 

 plates and central shaft and a 4340 hardened steel 

 nose. The existing fluke has been modified slightly. 

 The nose is no longer threaded to the central shaft; 

 the shaft and nose are now one piece and is fabricated 

 from 4140 steel. The main fluke plates are welded at 

 180 degrees rather than die original 140 degrees 

 included angle. 



