cable tensions with breakwater displacement in sway, heave, and roll 

 and the spring constants of the moorings on the breakwater. 



LTERPS is a linear interpolation subroutine which computes the 

 slop, ^ , and the interpolated value o£ Y for a given X and an array 

 of X vsf Y values. LTERPS is called by EQULIB and SPRING. 



3. Type of Computer and Peripherals . 



BRKMOOR was written for use on the CDC 6400 computer. It uses about 

 40,0008 words of memory. No peripherals other than the card reader and 

 line printer are required. 



4. Input Data . 



The input to BRKMOOR is as follows: 



Card #1 - Title card. Format (SAIO) . 



80 alphanumeric characters max. 

 Card #2 - Breakwater geometry card, Format (5F10.0). 



YCG = Vertical location of breakwater CG relative to 



water surface. 

 XCAB(l) = X coordinate of cable #1 attachment to break- 

 water (the CG is at X = and cable #1 is de- 

 fined as the cable with its anchor in the +x 

 direction) . 

 YCAB(l) = y coordinate of cable #1 attachment to breakwater. 

 XCAB(2) = X coordinate of cable #2 attachment to 



breakwater. 

 YCAB(2) = y coordinate of cable #1 attachment to breakwater. 

 Card #3 - Number of desired conditions Format (12) . 



(Also number of condition cards to follow) 

 Card #4 - Condition cards. Format (4F10.0). 

 (One card for each condition) 



FEXT = Force applied to the breakwater not due to moor- 

 ings in X direction (could be due to wave action, 

 tide, wind, etc. force in pounds). 

 SEP = Anchor separation in horizontal direction (feet). 

 TENSl = Nominal tension in cable #1 (lb.). 

 TENS2 = Nominal tension in cable #2 (lb.). 



It should be noted that only the following condition 

 combinations are possible: 



SEP 



SEP+FEXT 



TENSl 



TENSl+FEXT 



TENS 2 



TENS2+FEXT 



TENS1+TENS2 



80 



