Change History

GPSMAP 492 software version 3.40

as of December 17, 2008

Changes made from version 3.30 to 3.40:

• Fixed issue where items that are not drawn could be highlighted on the chart.

Changes made from version 3.10 to 3.30:

• Draw AIS target vessel's orientation according to COG history if heading information is not available.
• Added support for AIS message #24, which transmits the ship name, cargo type, etc. for class B transponders.
• Fixed issue that could lead to satellite acquisition problems on aging units.

Changes made from version 2.90 to 3.10:

• Fixed problem with NMEA output temporarily halting at 00:00:00Z.
• Incorporated recent changes to the Daylight Savings Time schedule to properly detect when DST starts and stops.
• Corrected the representation of Leading Lines and Recommended Route lines for some chart areas.
• Improved sonar performance.
• Fixed display of AIS vessels when not in North-Up Chart mode.
• Added the ability to remove sonar surface clutter.
• Minor improvements to Czeck, French, Greek, Spanish, and Polish translations.

Changes made from version 2.80 to 2.90:

• Fixed display of underwater rock depth.
• Fixed display of bridge height when reviewing bridge information.
• Fixed problem with tidal current speed computation which caused a small number of current stations to show extremely high speeds.
• Changed title of Highway page to 3D Highway to emphasise the feature as g2 3D perspective as opposed to legacy highway-only implementations.

Changes made from version 2.70 to 2.80:

• Improved the user interface for basemap loading.
• Improved labels on the map longitudinal grid lines

Changes made from version 2.60 to 2.70:

• Improved sonar auto gain feature for 50kHz.
• Corrected calculations for Current stations to fix incorrect time offsets and speed values.
• Made marine services without any listed services still searchable under the 'All' category.
• Added support for rotary Current stations.

Changes made from version 2.50 to 2.60:

• Fixed SBAS compatibility issues with the Japanese MSAS system.
• Fixed issue that may prevent changing the depth units for remote sounder devices.

Changes made from version 2.40 to 2.50:

• Improved the visibility of the track log.
• Improved reliability of sonar-related software updates.
• Fixed issue with display of depth soundings in intertidal zones.
• Added support for heading input via an external NMEA source.

Changes made from version 2.30 to 2.40:

• Removed duplicate results when performing find operations.
• Improved scrolling through chart notes.
• Allowed editing of the waypoint review page's reference, distance, and bearing fields.
• When a transducer is disconnected, the depth will blink signaling an invalid depth.
• Improved how detailed chart text is displayed on review pages.
• Added the ability to display submerged object data on maps.
• Fixed the 'Prepare Card for SW Update' function to detect devices connected serially or via CAN.
• When reviewing Marine Services, display all service items instead of just one from each category.
• Corrected the JPEG image viewer to show the next image instructions at the bottom of the JPEG.
• Enabled Croatian language support for the worldwide versions.
• Added current (tidal stream) support.
• General UI color improvements.

Changes made from version 2.20 to 2.30:

• Added foreign language support.
• Improved sonar operation and fixed various sonar related bugs.
• Fixed IIC driver issues.
• Fixed problem with small maps not being displayed properly.
• Improved harbor photo functionality.
• Added JPEG color palette dithering.
• Added a list of amenities to the FHS Facility review page.
• Fixed description for marine danger points.
• Changed software version to 2.30.

Changes made from version 2.10 to 2.20:

• Improved sonar operation and fixed various sonar related bugs.
• Added ability to review harbor photos that are linked to other types of map points, such as Marine Services.
• Fixed problem with incorrect baud rate when initially selecting NMEA format.
• Fixed AIS rate of turn calculation and heading line drawing issues.
• Improved route creation and editing functionality.
• Fixed problem with waypoint symbol colors.
• Fixed battery alarm operation.
• Changed software version to 2.20.