Hi,
a new FW-Update for the Oregon is available (my 300 runs smooth through the update):
Software 2.6
Fixed issue that caused a shutdown during power on
Added support for marine fishing, nautical, and off modes
Added tide and current charts
Added ability to access marine point information on the review page
Made marine POIs available when panning the map
Fixed issue when marking waypoints in the W Malayan RSO position format.
Added GDA 94 datum.
Added NAD 83 datum.
Improved user interface for waypoint location editing
Added 'Coordinates' option to the 'Where To?' menu
Improved position accuracy calculation
Improved static position accuracy