The calculated values included: 



P^, = horizontal tension load at anchor 



H 



Py = vertical tension load at anchor 



T = tension in sweepline at sentinel 

 X, = horizontal distance of sweepline 



G 



d^ = height of sentinel 

 a 



0' = angle of sweepline at anchor 



T" = tension of cable at ship 



Xj = total horizontal distance from anchor to ship 



S, = total line payed out from anchor to ship 



Again, many of the calculated values could be measured directly with 

 instrumentation. Tables were developed using values of s from 670 meters 

 to 1200 meters and varying from 5° to 80° (it was estimated that a sweep- 

 line length of approximately 600 meters would be used). Plots were also 

 made drawn to scale of the cable and sweepline at the various geometries. 

 It was felt that from instrument readings visual "interpolation" of cable 

 geometries between the various plots could be made. In this way a visual 

 indication of cable behavior could be made in real time, hopefully, with- 

 out the need of simultaneous calculations. Examples of the catenary plots 

 which were thus generated are shown in figure 15 and 16, - 



TABLES 



Table 1. Fixed Constants 



w - linear density of 9/16 in. dia. cable 

 D - ocean depth at MAVA 

 s - length of sweepline 

 P - weight of sentinel 



Table 2. Measureable and Calculatable Parameters 



T" - tension of cable at ship 



d - height of sentinel off bottom 



X - horizontal distance between anchor and sentinel 



X - horizontal distance between sentinel and ship 



S - amount of cable payed out 



Table 3. Calculated Parameters 



H - horizontal tension at bottom of catenary 



T - tension at top of sweepline 



T' - tension at bottom of cable 



W - weight of cable 



- angle at top of sweepline 



(() - angle at bottom of cable 



P^ - horizontal component of cable tension at depressor 



Pw - vertical component of cable tension at depressor 

 10 



