http://www.garmin.com/support/download_details.jsp?id=549
Changes made from version 3.60 to 3.70:
* Fixed transfer problem with custom waypoint symbols.
* Now reports DEM map support to PC software.
* Fixed lockup that could happen when selecting a Tracback point.
* Fixed shutdown caused by viewing some marine light points.
* Fixed problem with Indonesian Southern Grid using wrong longitude of origin.
* Added advanced NMEA support settings to support certain marine autopilot units.
* Fixed problem where the interaction with certain beacon receivers was not displayed.
* Added 'Select Map' option for Address and Intersection searching.
* Fixed problem where waypoint depth was not being saved as invalid when it was unknown.
* Fixed problem where waypoints could not be saved in certain areas of BlueChart maps.
* Fixed lockup that could occur when selecting symbols for waypoints.
* Added warning message about removing batteries when Pressure Trend Recording is always on.
* Fixed lockup that could occur when approaching certain roads on the map.
* Added Jumpmaster support under Setup.
* Made the way intermittent water areas are drawn more visible.
* Fixed problem where compass pointer could transition to the next turn too quickly.
* Fixed problem with bearing being adjusted improperly when projecting waypoints with a non-zero north reference.
* Fixed lockup that would occur when 'finding by name' and then viewing map information for the point.
* Fixed problem in tide charts where local time axis would not match the station time axis.
* Changed tide stations to show selected date when saved on a calendar day.
* Fixed a potential problem where the wrong number of bytes could be sent for USB get requests.
* Fixed problem with displaying 'Waypoint At Destination' while doing a tracback.
* Fixed lockup that could occur when approaching certain roads on the map.
* Fixed problem where route recalculation would slowly go to 100% and lock up.
* Improved WAAS search and selection process to be smarter in its handling of multiple SBAS service providers, overlapping service volumes, and exceptional conditions.
* Fixed lockup that could occur when selecting a tracback point.
