Furuno FR-1710 manual Zoom, Markers

1.29 Zoom

The zoom function is useful for enlarging an area of interest as large as twice the normal viewing. This performs the range scale re- duction to a half and the offset at the same time. Zoom can be used on ranges other than 0.125, 72, 96, 120 nm.

1.Place the cursor (+) close to the point of interest by operating the trackball.

2.Press the [ZOOM] key. The area around the cursor and own ship is enlarged twice as large as the original size.

3.To cancel zoom, press and hold down the [ZOOM] key about two seconds.

Note: The zoom feature is inoperative when the display is off centered.

Temporarily erasing heading line, north marker, stern marker, own ship symbol

To temporarily extinguish the heading line, north marker, stern marker and own ship sym- bol to look at a target which may be obscured by those markers, press the GAIN control (HL OFF control). The heading line, north marker, stern marker and own ship symbol reappear when the control is released. Note that the RP screen is also temporarily erased when the RP-17 is connected.

North marker

The north marker appears as a short dashed line. In the head-up mode, the north marker moves around the bearing scale in accor- dance with the compass signal.

+ +

CursorCursor

(a) Cursor placed at	(b) Press ZOOM
point of interest	key to zoom in.

Figure 1-38 Zoom

1.30 Markers

Heading line

The heading line indicates the ship’s head- ing in all presentation modes, and is a line from the own ship position to the outer edge of the radar display area and appears at zero degrees on the bearing scale in head-up mode, it changes the orientation depending on the ship orientation in the north-up and true motion modes.

Stern marker

The stern marker (a dot-and-dash line) ap- pears opposite to the heading line. It can be displayed/erased on the item MARK/LINE in the OTHER menu.

Own ship symbol

The own ship symbol appears at own ship position. It can be displayed/erased on the item MARK/LINE in the OTHER menu. The symbol is scaled to indicate length and beam of the vessel. If the largest dimension of the symbol gets smaller than 6 nm, the symbol will disappear and own ship will be repre- sented by a small dot or circle. The size of the symbol is set at installation.

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