The ReefMaster Sonar Viewer is a very new application for Windows PCs and Notebooks that combines a multi-channel sonar viewer with the display of side-scan sonar over a world base map. It works with sonar logs from Lowrance and Humminbird units, and lets you view any combination of your available sonar channels with smooth playback at speeds of up to 30x. Waypoints can be created and edited in the sonar views or map views, also loaded and saved in a different file formats.
The sonar viewer is designed with ease of use in mind.

highlight:

•  Supports Humminbird (including ONIX) and Lowrance sonar log files
• Multi-channel sonar viewer can display any combination of available sonar channels
• Map view displays in-situ sidescan sonar over world base map
• Brightness, contrast, sophisticated automatic gain correction and effection noise reduction
• Range of sidescan and 2D sonar colour palettes
• Display, create and edit waypoints, with loading and saving of waypoints to a variety of file formats
• Measure distance in the map or any sonar channel view and estimate object height or depth in the sidescan channel view
• Save or copy image snapshots from map or sonar views
• Metric or US units

Technical details:

•  Graphical track log and waypoint editing with world background map
•  Import of background images with graphical drag-and-size calibration
•  Easy import and export of GPX-format tracks and waypoints
•  Easy import and export of Lowrance and Humminbird native file formats
•  U.S. and Metric units distance and depth
•  E-mail support by the manufacturer!
•  Manually mapping by hand with editable waypoints
•  Export drawn maps to Humminbird and Lowrance devices or GPS track files
•  Unlimited number of waypoint groups
•  Attach unlimited notes and images to download waypoints
•  Easy Sorting waypoints by name, time, location or depth
•  Convert waypoint symbols between Lowrance, Humminbird and ReefMaster
•  Simple graphic editing the track logs
•  Sonar Viewer for compatible Lowrance and Humminbird sonar log files
•  Edit, split and merge tracks for export in a GPS
•  Login tracks in real time with NMEA 0183
•  Depth filtering of the track points
•  Easy Tide or water level adjustment
•  View, edit and remove waypoints in 2D
•  Automatically exclude duplicate tracks and waypoints upon import
•  Import and Export industry standard GPX files with read and write Humminbird and Garmin depth extensions
•  Import and Export Lowrance USR track and waypoint files with ICON support
•  Native import and export of Humminbird track and waypoint files
•  Import tracks from NMEA 0183 data log files
•  Humminbird: automatically import snapshots as waypoints
•  GPS device profiles for easy import of various devices
•  User records contain any combination of tracks, waypoints and maps for easy, one-click export of data groups