Furuno 1932 MARK-2 manual Echo Trail, Magnifying Long Range Echoes echo stretch

North up

North is at the top of the display and the head- ing marker moves with ship’ s heading. This mode is useful for determining ship’ s posi- tion and as a navigation monitor on a nauti- cal chart. The picture is stabilized against yaw of vessel, thereby reducing smear of target echoes.

Note1: This function magnifies not only tar- gets but also sea clutter and radar interfer- ence. For this reason be sure the sea clutter and radar interference are suf ficiently sup- pressed before activating the echo stretch.

Note2: ES2 is not available on short range.

True motion

True motion displays own ship and moving objects in their true motion.

3.4 Echo Trail

You can show the movement of all radar tar- gets relative to your vessel in afterglow. This function is useful for alerting you to possible collision situations.

3.3Magnifying Long Range Echoes (echo stretch)

Normally, the reflected echoes from long range targets appear on the display as weaker and smaller blips even though they are compensated by the radar’s internal cir- cuitry. The echo stretch function magnifies these small blips in all ranges.Two types of echo stretch are available: ES1 which stretches echoes in bearing direction and ES2 which stretches them in both range and bearing directions.

To turn the echo stretch on or off;

1.Press the [MENU] key to open the menu.

2.Select “ES.”

3.Each press of the [ACQ/ENTER] key changes the echo stretch function status in the sequence of ES1, ES2 and OFF . ES1 or ES2 appears at the top right-hand corner of the display when echo stretch is on.

Bearing	Bearing
direction	direction

Starting echo trail

1.Press the [MENU] key to open the menu.

2.Select “ECHO TRAIL” by the omnipad.

3.Select “ACTIVATE” by pressing the [ACQ/ ENTER] key.

Figure 3-4 How the echo trail feature works

TRAIL, the echo trail time selected (on “OTHERS MENU”) and elapsed time appear at the top right-hand corner of the display . Then, afterglow starts extending from all tar- gets.

Note: Trails are restarted when range or mode is changed or zoom or of fcenter is turned on.

Range direction

Echo stretch 1 Echo stretch 2

Figure 3-3 Echo stretch

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