Section 17 Setting up Alerts  17-10 
 
17.5  Setting Up Look-ahead 
When [Look-ahead] is selected in the classification pane, the [Look-ahead] dialog is displayed in the 
edit pane. 
In this dialog, the selection of the sizes of both a danger detection vector/sector and the switching to 
enable/disable of them are possible. 
 
This unit can monitor when own ship tries to cross over the preset safety contour or danger area, or 
when dangerous objects enter the sector specified around own ship. For this monitoring, danger 
detection vectors and sectors can be displayed. As for danger detection vectors, detection ranges for 
crossover of safety contours and danger areas can be specified in units of minutes or nautical miles, 
and notches on vectors and tips of vectors indicate predicted positions if navigated at the current 
speed. Also, the radius of a sector can be set up in units of miles or minutes. 
 
 
   
Radius of a danger detection sector 
(1.0 min to 30.0 min/0.1 NM to 5.0 NM)
 
 
 
 
Length of a dangerous detection vector   
(1.0 min to 30.0 min/0.1 NM to 5.0 NM)
 
Angle of a danger detection sector 
(0.
1 degrees to 360.0 degrees) 
Width of a dangerous detection vector 
(
Width of own ship to 25.0 m) 
Dangerous Detection Vector and Sector