Speed over ground (SOG)

•Indicates speed over ground as received from the GPS



Velocity Made Good (VMG)

•Indicates current velocity made good, as calculated from speed and course over ground

•The heading used for the calculation is easily entered from the buttons on the case or the remote



Trend arrows

•See the trend in speed or VMG over a few seconds right next the instant numeric display

•Gives an indication of loss or gain after a change is made, or acceleration after a tack



Course Over Ground (COG)

•Indicates course over ground as received from the GPS



Starting line distance

•Indicates the perpendicular distance from the RockBox to an infinite starting line that goes through the two marks

•Dedicated buttons on the case make it easy to press the right button when in position to set the marks

•Easily reset one or both marks at any time

•Plus and minus side of line indicator

•The fast update rate of the GPS inside the RockBox really shines here!



Countdown timer

•Dedicated button on the case makes it easy to set and start the timer

•One minute increments in the time set allows synchronization of the timer even if a 5 minute gun is missed



Knock-lift indicator

•Graphically indicates the difference between a base heading and your current heading

•Allows easy identification of wind shifts while sailing upwind

•Remembering a series of headings to spot wind shifts is not necessary anymore!

•Indicates your current course versus a base course



Histograms

•Graphically indicates a history of speed or VMG

•Make it easy to see changes in speed or VMG over time, without the need to remember old values

•Spot drop offs in speed to know when a sail or trim change is needed

•After a trim change is made, you can let the boat settle in for a while and see the result



Data logging

•Lets you review your performance and path after a race

•Outputs the standard NMEA GPRMC sentence containing:

•Speed over ground

•Course over ground

•Latitude

•Longitude

•Date

•Time

•Easy to disable by removing the SD card, for classes that ban data logging