JRC JMA-2353 Instruction Manual page 61

1 Select
The soft key menu disappears and "Vector Length" of the soft key display is
color-inverted.
"Vector Length" is activated.
2 Operate with the soft keys.
Soft key 1: True
Switches between true vector mode and relative vector mode.
Soft key 2: Not available
Soft key 3: Not available
Soft key 4: Vector Length
When "Vector Length" of the soft key menu is selected, "Vector Length" of the
soft key display is color-inverted.
Vector time can be set in minutes in the range 1 to 60 min.
Turn the [MULTI] control to set the vector length.
Reference:
When "Vector Length" is not selected on the soft key menu, press the soft key 4 to activate
the Vector Length function.
 Vector display
Note:
 When a target or own ship changes its course, or when a new target is
acquired, its vector may not reach a given level of accuracy until three minutes
or more has passed after such course change or target acquisition.
Even if three minutes or more has passed, the vector may include an error
depending upon the. tracking conditions.
Vector Length on the soft key menu.
Select "Vector Length" and press the control.
Relative
Chapter 2 OPERATIONS
2.7 SOFT KEY OPERATION
2
2-27