Purchase It Online or via phone/mail order:

Purchases on this page are handled by PayPal.  They process your order and send us the proceeds minus their fee. Then they send both of us e-mails confirming the order. Your order will be shipped at the first opportunity along with a confirmation e-mail that explains how you can download the program too. This email may take a while as orders are processed by a human once or twice a day. Please include your phone number. You become registered with us automatically.  Buying with Paypal does not require signing up for a Paypal account (unless you want to).

There is basically only one product to buy and it is called SeaMarks.   You can also order the Maps Unique Waypoints to go with SeaMarks.  They are for the central East coast of USA.

Note: If you have one of those ultra thin notebook computers without a CD drive, we deliver the software on a unique credit card flip out USB flash drive for an extra $5.

Also note, if you live in the middle of the state or the middle of the country, tell us what part of the coastline you fish so we can include the appropriate NOAA region charts with your package.

To order via phone, call 321 725 4115
To order via US mail send order and check to:
Andren Software Co.
906 S. Ramona Ave.
Indialantic, FL 32903-3435

Add 6% sales tax if you live in Florida.
Please include phone number and email address if you have them.

For local dealers see the bottom of this page.

SeaMarks (for Windows 95 through 10) on CD or USB

Note: USD is US Dollars not USB


SeaMarks Combined with Maps Unique waypoints (for WINDOWS 95 through Windows-10). The 3000 Maps Unique waypoints are for NC, SC, and the North Georgia Atlantic coast.

Click here for data on Maps unique

MU with option  

See below for upgrades and the Maps Unique data base. 
If you bought an older version of the program (more than 2 years earlier) and it is registered with us, then you can upgrade it to version 9.0 below. This is not a patch, but a whole new CD/USB so you don't need the old copy. If you bought a version 8.6 or later (purchased within the last 2 years), go to the Product Support page for a free patch upgrade.The price of the upgrade is dependent on the version you purchased.  This means it costs more the older your purchase was.  This covers the cost of developments since your last purchase.

Upgrade for SeaMarks/LoranGPS on CD or USB

Upgrades are from your old program to the latest version.

 You can get the Maps Unique data base alone or with a SeaMarks upgrade


Conversion service is available.

We will convert your Loran data to GPS using SeaMarks and return you an emailed file with the data and a chart.  The fee is $30 flat rate if no typing by us is needed to convert the file.  The file should be transmitted to us in an email as a simple comma separated file or an Excel spreadsheet.
If we have to type the data in, then there is an additional  typing charge of $30 per 50 waypoints or fraction thereof.

The preferred form of data wanted is a comma delimited pure text list like:
17429.1, 43867.5, PAULS, AWFUL LEDGE  PAULS REEF
17362.5, 43913.2, WP0003, WHALE SNOT POT HOLE
17348.0, 43701.6, NONEXIST, 800 LB SPONGE IN BLUE HOLE
This is a file with four fields: TD1, TD2, NAME, DESCRIPTION.  If you want more fields in the list, like icon, then you can add them too.  The minimum number of fields is 2: TD1, TD2.  Just make sure that however many fields there are in the list, there are one fewer commas. All rows of the list should have the same number of fields (and commas).  If any field data is missing, just leave it blank, but include the appropriate commas.  Please do not double space the rows.

The list can be embedded in an email or in a text file or spreadsheet attached to an email.  If you mail or FAX a hand written or typed list, then the higher (typing) cost applies.  We also need an initial lat/lon estimate of the location of the points to be converted.  It should be within 50 miles of the points to be converted to let us know what Loran chain is being used.  That would be like: 28 05.0N  80 13.0W for offshore Melbourne Florida.  You could use the name of the nearest city or inlet instead, like Port Canaveral.

An Excel spreadsheet is also OK. Make it one waypoint per row with no commas or quotation marks. The file should have two columns for the loran numbers, up to 10 columns for other data, and no blank rows.  You can include a header row with column names.
Email the file to sales@andren.com

These are some conversion options:

  1. Conversions from one GPS brand's format to another is  $30, flat rate.
  2. Conversion of a properly formatted digital list of Loran TDs to Lat/Lon is $30 flat rate.
  3. If you want Loran data converted and returned in a file to import into your GPS, let us know the make and model of the GPS.  The cost is $40
  4. If you want option 3 and want the results shipped to you on a 1GB SD card the cost is $50

Conversion Service. for Loran TDs Flat rate is for a formatted file emailed to us. If typing is needed then quantity equals 1 plus the number of blocks of 50 waypoints.  For other options like this, please contact Andren Software by phone or email to get a quote.


Conversion options

Buy It From A Local Dealer:

Instead of buying mail order from the Andren Software Co., you can get the program from one of these dealers. If you do, be sure to register your copy or you may miss out on updates and upgrade notices.

Kayak Experience, 600 Hwy 98 East, Destin, FL 32541, 850-837-1577, Marlese Ford

Jim's Dive Shop, 9385 Bay Pines Blvd., St. Petersburg, FL 33708, 727-393-3483, Terresa

Like with all software, you are entitled to the latest version available on the date of your purchase as well as periodic updates for that version. Since the product might be updated after it is shipped to dealers, you can obtain the latest update via download. Just run your new program and periodically use the check-for-updates menu under the Help menu. Or, you can e-mail or call us with the particulars of your purchase and you will get instructions on how to proceed. You will also be registering at the same time. Meanwhile, you can begin entering data right away using the version purchased; as updates do not erase your work.