

       
                               TIDES4XX

                           NAUTICAL SHAREWARE
                          32 Barney Hill Road
                         Wayland, MA 01778-3602
                            (508)-358-7938
                         epwallnr@world.std.com
   
     
     INTRODUCTION
     
     TIDES4XX is a program for predicting the height of the tide or the 
     strength of the tidal current at various stations. It runs on IBM 
     compatible machines under MS-DOS or IBM-DOS. The method and format 
     followed in the predictions are generally those used by the 
     National Ocean Service (NOS) in the standard tide and current 
     tables. 
   
     The program may be freely copied and used for non-commercial 
     purposes. Feel free to try the program and to pass it on without 
     alteration and without charge for trial use. If you use the program 
     a $15 registration fee must be paid. 
   
     Predictions may be made for high and low water, for hourly heights, 
     for specified times and for the extreme high and low for any 
     interval. A rough plot of the height can also be displayed.  
     
     The corresponding predictions may be made for tidal currents.  
     
     Predictions may be made for the indefinite future (or past.)
     
     Data files for all U.S reference stations and many foreign stations 
     are available. Files may be created for a large number of 
     subordinate stations and many are already available. 

     TIDES4XX should run on any IBM machine or compatible with 128K of 
     free memory and the text output should be OK on any printer. The 
     printed plot of tide heights uses IBM extended ASCII. For HP 
     
     A trial copy of the program is available by anonymous ftp from: 

     ftp.std.com/ftp/pub/wallner