Garmin gmr 20 Manuale Utente

GMR 20/40 O

PERATION

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HE

 R

ADAR

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DJUSTMENT

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ENU

1.  Using the 

ARROW KEYPAD, highlight Move and press the 

ENTER key.

2.   Using the 

ARROW KEYPAD, move the center point of the 

VRM to the desired location.

3.  Press the 

ENTER key 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.

The Mini Automatic Radar Plotting Aid or MARPA function is used 

to aid in collision avoidance. MARPA can track up to ten designated 

targets. Detailed information including Bearing, Range, Course, 

Speed, Closest Point of Approach, and Time to Closest Point of 

Approach for each target is displayed in the MARPA list. 

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.

For each target, a number and Vector Line is displayed 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. 

1.  Using the 

ARROW KEYPAD, highlight Acquire Target and 

press the 

ENTER key.

2.   On the Radar page, using the 

ARROW KEYPAD, move the 

pointer to the desired target and press the 

ENTER key.