User Guide

■ The estimated current bearing of the contact is a point just ahead of the arrowhead. The last
reported bearing is represented by the tick mark closest to the arrowhead.
NOTE: All of the current estimates represented by the ruler appear in numerical form under the TMA
board.
Manipulating the Ruler:
• Adjusting length and direction: Click and drag the end mark or the arrowhead to adjust the
length or direction of the ruler.
•
Positioning Tick marks: The tick mark closest to the arrowhead should be placed on the most
recent bearing line.The end tick mark should be positioned on the initial or oldest bearing line.
•
Using the Handle: A circle appears at the center of the ruler when more than one tick is present
and speed is more than zero.The circle acts as a handle.Click the handle and drag the entire
ruler to another location.The handle maintains the current course and speed settings of the ruler
and adjusts range and bearing.
Sub Command Tip: Center on the ruler and zoom in to better manipulate the ruler
and access the handle. If you have difficulty dragging the ruler to get the
arrowhead pointed in the desired direction, enter the desired course number in the
course field. You can also press q and click the TMA board where you want to
place the end of the ruler or press q and right-click to place the arrowhead.
THE TMA DOT STACK
The dot stack in the upper left corner is a graphical representation of the error between tick marks
and bearing lines.The dot at the top of the stack is associated with the most recent bearing line.
The analysis is probably correct when the top most dots are on the centerline.This process is
called stacking the dots.
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