A = 



Anchor 









» 



B - Sentinel 









[ 



C = Ship 





B ^y"^ 



sX 



/ ^ 



A 



s 



' 



:\^ 





/ 





X 



p 



X 





XT 



FIGURE 9 RECOVERY ARRAY GEOMETRY 



bottom 



FIGURE 10 SWEEPLINE GEOMETRY 



25 



