Using Marpa Card - Raymarine GPS Kit Operating Manual

What is around me?
Using MARPA....
Card No. 15
What is MARPA?
Mini Automatic Radar Plotting Aid (MARPA) functions are used for target tracking and risk analysis. MARPA
improves your standards of collision avoidance by obtaining detailed information for up to 10 targets, and
provides continuous and rapid situation evaluation.
MARPA tracks the selected targets and calculates target bearing, range, true speed, course, Closest Point of
Approach (CPA), and Time to Closest Point of Approach (TCPA). Each tracked target can be displayed with a
CPA graphic depicting the approximate target speed (vector length) and course (vector direction).
Alternatively, move the cursor over the target to display the range and CPA. You can now access bearing and
speed. Each target is continually assessed. An alarm sounds if a target becomes dangerous or lost.
NOTE: For MARPA to operate, fast heading data is required.
How do I set up the MARPA functions?
TARGET
TRACKING...
How do I acquire a MARPA target?
Move cursor over
target to acquire
MARPA target symbols
How do I view details of MARPA targets?
TARGET
TRACKING...
How do I cancel MARPA target(s)?
?
More information...
MONITOR
IN ZONES
MARPA & AIS
OPTIONS...
TARGET
TRACKING...
Target being acquired
MARPA LIST...
CANCEL TARGET
See the 'Using the radar' chapter of the Reference Manual.
MARPA & AIS
ACQUIRE TARGET
OPTIONS
Highlight
and select
ACQUIRE TARGET
180 0
2.3kt
The target is acquired -
this takes a few seconds
Safe target
ID Bearing Range Course
2 312 o T 1.739nm
3 274 o T 3.242nm
4 086 o T 1.305nm
5 247 o T 1.774nm
Tracked targets with data listed.
Or:
MARPA LIST...
MARPA LIST
Select
value
Repeat to
acquire further
targets
T
(10 max)
Dangerous target
MARPA LIST
True True
Speed CPA TCPA
342 o T 9.9kt 1.739nm 00h00m00s
335 o T 68.4kt 3.242nm 00h00m00s
276 o T 9.4kt 1.305nm 00h00m00s
321 o T 22.7kt 1.774nm 00h00m00s
CANCEL ALL
TARGETS
CANCEL TARGET
AIS LIST
OK