
SeaMarks manual I. INTRODUCTION •
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I. INTRODUCTION
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What can the SeaMarks program do?
This computer program helps you organize your fishing spot data (waypoints, a.k.a. readings or marks) accumulated
over many years and many trips. It also converts Loran TDs to GPS and offers the best conversion accuracy available.
You can update and print a new book of waypoints whenever you need to. It has routines for organizing, displaying,
printing, plotting, and planning that will make your wealth of data work better for you. It will import and export data to
your GPS easily so that you can move waypoints and routes from one brand to another and have a hard copy of the data
in the GPS. While the program supports Loran data, the Loran features can be hidden if desired. The program has
recently been re-branded from LoranGPS to SeaMarks to stress its GPS centric evolution. Some of the features of the
program are:
Import/export files compatible with GPS data cards to transfer waypoints and some tracks between your GPS
and PC. Includes C-Map, Garmin, Furuno, Humminbird, Raymarine, NorthStar, Simrad, Navman,
Lowrance, Raytheon, Sitex, Std. Horizon, and others. Also import/export files from other programs
like Coastal Explorer, Humminbird PC, Raytech Planner, PC-WindPlot, C-Map’s PC-Planner, Ozi-
Explorer, Maptech, Mapsource, HomePort, Nobeltec, Loran Locator, Offshore Hunter, Text, CSV,
Fugawi, Gardown, G7toWin, PCX-5, GDM6, GPSU, GPSbabel, EasyGPS, MaxSea and others.
Upload and download the waypoints stored in a variety of GPS units via cable connection. Currently handling
Garmin, Lowrance, Eagle, Furuno, and NorthStar. Cable not supplied.
Conversion - The program can convert waypoints from any Loran chain including old A and C chains to
Lat/Lon (GPS) and can convert GPS waypoints to Loran TDs. You can precision calibrate the
conversions for the highest possible accuracy by training it on good local data. It handles both the old
and the new versions of Loran chains 9960 and 8790 to account for timing changes introduced 1/17/07.
Storage - Stores waypoints in files of up to 32,000 waypoints. Each waypoint includes fields for Name,
Latitude and Longitude, Loran TDs, Range, Bearing, Rating Depth, Description, Icon, Date Code,
Comments, and Color.
Display by list or chart - Displays file data on the screen in list (spreadsheet) form with Lat/Lon, Loran TDs,
and/or Range/ bearing along with the rest of the waypoint data. Also displays the file data graphically
(plots) on the screen as simple charts with Lat/Lon lines, Loran lines, waypoints, and a coastline. You
can also display and print on NOAA charts of the BSB/KAP or NOS/GEO formats. You can export
KML files to display your points, routes, and tracks on Google Earth.
Organizing - You can reorder the file by sorting waypoints on any field. Double clicking on a column header
will sort the file by that field. For more complex sorting, a menu item is available.
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