Improve depth sounding rendering method

v4.0.10

Legacy Version 4.0.10

Correct local chart server system identification, Mac specific. Legacy build

v4.0.5

Version 4.2.1

Disable SGLock initialization on MacOS

v4.0.4

Version 4.0.4, Mac specific

Add support for Virtual AIS ATONs

v4.0.2

Version 4.0.2

v4.0.0

Add support for o-charts private chart servers.

v3.3.4

Performance and reliability upgrade.

v3.3.0

Maintenance update in preparation for expanded plugin chart support.

v3.2.0

General update with various improvements and bug fixes

v3.0.0

Update to support optional USB Key Dongle for Chartset security and portability.