Garmin GPSMAP 3205 User Manual

Page 98

GPSMAP 3205 Owner’s Manual

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To adjust the VRM/EBL:

1. Highlight

Adjust and press the ROCKER to the right. Highlight Adjust and

press

ENTER.

2. Press right or left on the

ROCKER to rotate the EBL around the center

point of the VRM.

3. Press up or down on the

ROCKER to increase or decrease the size of the

VMR.

4. Press

ENTER to accept the changes.

To move the center location of the VRM:

1. Highlight

Move, and press ENTER.

2. Using the

ROCKER, move the center point of the VRM to the selected

location.

3. Press

ENTER to set the new location.

To use the VRM/EBL, expand the diameter of the VRM so that the outer edge

touches the target. Rotate the EBL until it intersects the VRM at the target

location. The measured range and bearing are displayed in the lower-left corner of

the screen.

MARPA

The Mini Automatic Radar Plotting Aid (MARPA) function helps with collision

avoidance. MARPA can track up to 10 designated targets. Detailed information

including bearing, range, course, speed, closest point of approach (CPA), and time

to closest point of approach (TCPA) for each target is shown in the MARPA list.

NOTE: MARPA requires the use of a heading sensor. The heading sensor

must output the NMEA sentence HDM or HDG at format 0183, v2.30, or

higher. The Gamin Marine Network has been tested using the KVH

1000

heading sensor using six second dampening.

MARPA relies on a Heading Sensor to provide accurate own vessel heading

information. Accurate heading data enhances MARPA’s performance. Each target

being tracked by MARPA is represented by a symbol. The symbols indicate the

current state of the target.

Acqurng target

Target s safe

Target s dangerous

Lost target

For each target, a number and Vector Line is shown with the symbol. The number

is the MARPA list ID number. The Vector Line is a visual reference of the target’s

course and speed.

To designate a MARPA target:

1. Use the

ROCKER to move the pointer to the target location.

2. Press the

Acquire Target soft key.

When a target is first acquired, a red box appears around the target. When

MARPA begins tracking the target, the box is replaced with the appropriate

symbol.