Position Spacing The spacing of positions controls the gap between the past position dots. The minimum is 1 minute and the maximum is 120 minutes. To change the position spacing click in the Desired field and when the current value changes to green move the trackball to increase or decrease the value, click again to accept the selected time. When a time is selected the Displayed time will change to match the desired time. Position Details To view details on past position dots or event marks click the Position Details check box and move the cursor over the symbol. A transparent popup window will appear showing details of the symbol, including date/time of creation and its latitude and longitude position. Event Marks Event marks may be applied at any time to ownship's history track. These are displayed as an event mark symbol. To generate an event click the Add Event button. An orange outline box with a diagonal line through it is shown on the history track at the current CCRP position. The display of events can be toggled on and off by ticking the Display Events check box. When an event is added to a history track the marker will appear at its original position whenever Display Events is switched on.