.XT:0 .XB:0 .E:0 (s 1p 14.4v 0s 3b 4T NAUTICAL SHAREWARE (s 0p 10h 12v 0s 0b 3T (10U 32 Barney Hill Road Phone: (508) 358-7938 Wayland, MA 01778-3602 email: epwallnr@world.std.com Dear TIDES4?? user, Here is a copy of the latest release of the tide and current predicting program TIDES4??. This is a user supported shareware program for non-commercial use. You are encouraged to copy and pass on the program without alteration and without charge for trial use. If it is used beyond a reasonable trial period the user is obliged to pay the $15 registration fee. Read TIDES4XX.DOC for details on the program and its operation. --------------------------------------------------------------- In order to make predictions for a specific location harmonic constants for that place must have been entered in a ---.TD4 or ---.CR4 data file. Local U.S. reference stations for which the National Ocean Service (NOS) publishes tide tables and selected subordinate or foreign stations are already on the disk and are listed in the file STALIST.T&C. This list is displayed when the program is run. The station file name can also optionally be included in the command line when calling the program, for example by entering: TIDES4?? BOSTON.TD4 Data files can be created with menu option H using either harmonic constants or differences between the tides at a reference station and at a subordinate station as given in Table 2 of the National Ocean Service tide and tidal current tables. Harmonic constant data for tides and currents for many other U.S. stations are available. I will send the data for a few stations listed in the U.S. tide or current tables for the east or west coasts to any registered user who requests them. (Specify the latitude and longitude to the nearest minute as well as the name of the location. Data for the closest station will be provided.) TIDES4??.DOC gives instructions for making data files using this data. The data can also be provided on a customized disk. Data for Canadian, Australian, New Zealand and Japanese ports and limited data for other foreign ports are also available and will also be provided on request to registered users. Again specify the latitude and longitude of the station as well as its name. Foreign data is of varying age, completeness and accuracy. Please let me know if you want additional data or have any questions, problems, comments or suggestions. Ed Wallner