Echoview assigns the following line status to line segments in a line:
good (displayed in green)
bad (displayed in magenta)
unverified (displayed in cyan)
A line status of good or bad is automatically assigned to line data when lines are created by line picking.
To manually assign line status:
Make the line active by selecting it from the Line draw tool list 
Select the section of the line to which you are assigning a line status, using one of the selection tools.
On the Shortcut menu (right-click), point to Set Line Status and then click the required line status
Note: Ifyou choose None, the section of the line will be deleted.
Note: When you assign line status manually, new interpolated co-ordinate points are created.
Line status has the following uses:
as a quality control tool for bathymetric applications.
only pings with a good exclude-below line status are used to calculate the mean line depth (Exclude_below_line_depth_mean) and mean line range (Exclude_below_line_range_mean).
pings with a bad exclude-below line status can optionally be excluded from analyses (on the Analysis page of the Variable Properties dialog box).
the exclude-below line status of a ping, is the status of the chosen exclude-below line at the time of the ping.
About lines
Line picking
Creating, renaming and deleting lines
Importing lines
Exporting lines