What do the symbols mean?

Symbol	Explanation
	The green ball indicates that a survey or certificate needs to be updated in this period. At the moment, no additional actions are required.
	The green ball with the curl indicates that this survey has been performed. This survey has been included in the history tab.
	The orange triangle indicates that the survey or certificate renewal is currently in the window period and therefore needs your attention.
	The red diamond indicates that a survey or certificate needs to be renewed and actually is overdue.
	The line to the left of a symbol indicates the window period before the survey or certificate renewal. The length of the line indicates the number of months in this period.
	This certificate has expired and the due date is not in the current view.