If you have any questions about any of our products please do not hesitate to email us at  

Problem with Norton

Help - User Manuals are available for our products, they can be downloaded and saved to your computer, click on the link below
Tide Plotter    User Guide
Chart Plotter   User Guide

Chart Plotter activation code.
When you purchase Chart Plotter you are provided with an activation code. This permits installation on two computers thus allowing a backup. If you have made two activations and subsequently encounter a compute failure or make one cmputer redundant and wsh to activate on a new computer then email your activation code to us and we will facilitate another installation.

Ais driver
Radar gadgets USB AIS driver
Digital Yacht Uais driver

GPS Drivers
GPS ND-100 Windows 7 and Vista version 
click here
GPS ND-100 Windows XP version  click here

GPS BU-353 Windows Vista version 
click here
GPS BU-353 Windows XP version  click here 
GPS BU-353 Windows 7 version 
click here
GPS BU-353 Windows 8 and 10 version click here

GPS BT-821C User Manual  click here

Installation notes for GPS BU-353 click here


USB to Serial port converer lead drivers
Windows Vista version click here
Windows XP version  click here 
Windows 7 version 
click here

Utility to test GPS satellite aquisition
click here
AIS utilility to calculate CPA and TCPA click here

Electronic books (pdf format)
Logbook - print out your own log book, also includes useful navigational information click here
Working with Tides - 68 page book giving the theory of how the tides work and practical exercises click here