Card #5 - Tide Card, Format CI1,9X,5F10.0) . 



NTIDE = Number of tide values to follow (max = 5) . 

 TIDE = Tide position in feet relative to that at which 

 the anchor depths are given. 

 Card #6 - Cable #1 Parameters, Format (I2,8X,2F10.0) . 



NSEG = Number of different segments (types of cable ma- 

 terials) from which the cable is constructed. 

 DEPTH = Depth of water at the anchor (feet) . 

 BSLOPE = Slope of bottom in region of anchor (feet/feet). 

 Card #7 - Cable segment properties Format (I5,5X,2F10.0,A10,F10.0). 

 One card for each of the number of segments listed in card 

 6 parameter NSEG. 

 NSECT = Number of sections into which it is desired to 



divide the cable segment. 

 ALSEG = The length of this cable segment. 

 WPF = Weight per foot in water of the cable material in 



this segment. 

 MATE = Material name (as the program now stands this 



must be CHAIN or NYLON (Name must begin in column 

 31). 

 DIAM = Diameter of the nylon rope or of the chain link 

 in inches. 

 Card #8 and #9 - Same as cards #6 and #7 only as applies to cable. 

 #2. 



Table B-1 illustrates the input cards for a test case. All the 

 read statements for the program are in the main program along with com- 

 ments and explanations of input requirements. 



5. Mathematical Procedures and Program Limitations, 



The basic cable computations which take place in LINE2 require some 

 explanation. As was stated previously, the weight of each cable section 

 is co".sidered to be concentrated at the bottom of the section. In order 

 to find the shape of the cable, summations of forces are computed for 

 static equilibrium at each node. At each node we know the tension in 

 the cable section above the node as well as the angle of that section 

 with the horizontal. Figure B-1 illustrates the cable about the ith 

 node. 



If the angle <i>^ is taken to be the angle from the horizontal, then 

 the angle 't>i_ + i can be computed as follows: 

 , T^ siTK^^ + Wj^ 



'''i + l 

 where T 



= tan 



[- 



T^ cos 



-] , 



'1 ^"-^ '^'i 

 tension in section i. 



(B-1) 



Wj^ = weight of section i concentrated at node i , 



