GCPATH- 



GEODIST- 



GEOPATH- 



GRIDBLK- 



Subroutine used by SEAARCH for indirect 

 solution of the great circle. 



Subroutine for the direct solution of 

 the geodesic. 



Subroutine for the indirect solution 

 of the geodesic. 



Subroutine which calls in the gridded 

 data from the random access storage 

 device for BATHY. 



LOOKUP- 



Subroutine which "looks up" or extracts 

 the relative address, block size and 

 the column and row information for each 

 MSQLOC area from the random access 

 storage device previous to passing this 

 information to BATHY. 



LINE- 



MERFIX- 



MINCON- 



Calcomp plotter subroutine to automati- 

 cally draw a line as a function of 

 X and y. 



Subroutine which calculates the rhumb 

 line distance and sets up a scaling 

 factor for nautical miles along a 

 profile. 



Subroutine used to calculate the start 

 point for a profile within a MSQLOC 

 area. 



MSQFQ- 



MSQLOC- 



PLOT- 



PLOTS- 



PUNOUT- 



Subroutine used to calculate in part 

 the MSQLOC area numbers for points on 

 the profile path. 



Marsden Square Locator Number (Marsden 

 square system is a numbered, 10 degree 

 rectangular grid of the world which is 

 subdivided further into 5 and 1 degree 

 squares) . 



Calcomp plotter subroutine which moves 

 pen in x and y direction. 



Calcomp plotter subroutine which 

 initiates plotter action. 



Subroutine which places each MSQLOC 

 area profile on magnetic tape. 



56 



