Raymarine hsb2 - 7.5 MARPA Set Up Parameters

Chapter 7: Setting Up the System Defaults 7-13
MARPA Set Up
Parameters
7.5 MARPA Set Up Parameters
The MARPA set up menu provides options to specify the target vectors, safe
zone and target history display.
The following table lists the MARPA Set Up parameters and their options,
shows the factory default setting, and provides a space for you to make a note
of your new default setting. Each parameter is described in the following
subsections.
Target Vector and Predicted Position
The target vector can be True or Relative. True indicates the target’s true
course and speed over ground. If selected, the vessel’s vector is also shown. A
Relative vector indicates the target’s course and speed relative to your vessel.
The length of the vector is determined by the target predicted position after a
set time interval.
Safe Zone
The safe zone options are used to set the dangerous target alarm limits.
The safe zone is a ring, centred on your vessel, within which a target is
considered dangerous. A target can also be considered dangerous when it is
within a specified time of the safe zone.
You can set the safe zone to off and the safe zone ring can be displayed.
Target History
Target history can be set to plot the targets previous position at specified
intervals. The four most recent position points are displayed.
Table 7-5: MARPA Set Up Parameters
Parameter Options Factory Default New Default
TARGET VECTOR TRUE
RELATIVE
RELATIVE
VECTOR LENGTH 30 SECS, 1 MIN, 3 MINS,
6MINS, 12MINS
3MINS
OWN VESSEL
SAFE ZONE
0.1 nm, 0.2 nm, 0.5 nm,
1.0 nm, 2.0 nm
0.5 nm
TIME TO SAFE
ZONE
1MIN, 3MINS, 6MINS,
12 MINS, 24 MINS
3MINS
SAFE ZONE RING OFF, ON ON
TARGET HISTORY OFF, 1 MINS, 2 MINS,
4MINS
OFF