Log Message:
Update OpenCPN to 4.2.0.
Changes since 4.0.0:
 As a successor to OpenCPN Version 4.0, OpenCPN Version 4.2 contains many new \ 
features and enhanced functions.

 Among them are:

 ..Increased performance in all modes, particularly when using OpenGL graphics \ 
acceleration.
 ..Integrated Chart Downloader PlugIn, allowing systematic tracking and donwload \ 
of latest online charts from several popular sources.
 ..Integrated World Magnetic Model (WMM) PlugIn, providing accuratley calculated \ 
magnetic variation worldwide.
 ..Major update to embedded Users Manual.
 ..Measurably improved performance and reliability over all supported platforms.

more details here: http://opencpn.org/ocpn/release4.2