NorthStar Navigation EXPLORER 657 Chart modes, Latitude and longitude, Chart scale

3-2-1 Chart modes

The Chart has two modes:

Center on boat mode

To switch to center on boat mode in the chart

window, press . The boat is at the center of the chart. As the boat moves through the water, the chart automatically scrolls to keep the boat in the center of the chart. The cursor (see below) is turned off.

Cursor mode
The keys	and are called cursor keys.

To switch to cursor mode in the chart window, hold down a cursor key. The cursor appears and moves away from the boat:

Press the key which points in the direction that the cursor will move, for example press

to move the cursor down.

Press midway between two of the cursor keys to make the cursor move diagonally.

Hold a cursor key down to make the cursor move continuously across the display.

In Cursor mode:

The distance (DST) and bearing (BRG) of the cursor from the boat are displayed at the bottom corner of the display.

The chart does not scroll as the boat moves.

If the cursor reaches the edge of the display, the chart will scroll.

For example, hold down to move the cursor to the right side of the display and the chart will scroll to the left.

3-2-2 Latitude and longitude

Latitude and longitude can be displayed in the data header. The display is degrees and minutes to three decimal places, about 2 m (6 ft) resolution. Normally the position is the boat’s position, and the latitude and longitude has a boat symbol to show this:

36° 29.637’ N or S	Latitude
175° 09.165’ E or W	Longitude

If the cursor has been moved in the last ten seconds, then the position is the cursor’s position, and the latitude and longitude has a cursor symbol to show this:

36° 29.841’ N or S	Latitude
175° 09.012’ E or W	Longitude

! WARNING

When reading the boat position, make sure the position is not the cursor position.

3-2-3 Chart scale

Press to zoom in and display a smaller area of

the chart in more detail. Press to zoom out and display a bigger area in less detail.

The chart scale is displayed at the top left of the chart:

3-2-4 Chart symbols and information

The chart shows many kinds of symbols, such as waypoints, ports, marinas, buoys and beacons. If

necessary, press or or to choose a chart scale where the symbol is displayed.

To see stored information about a symbol:

1Either move the cursor to the symbol on the chart and wait two seconds

or use Find to move the cursor to a symbol for a port or service (see section 3-2-5).

2A window appears at the bottom of the display with some information about the symbol.

3To see more detail about a symbol or a list of

associated items for the symbol, press :

i Select an item to display. If there are more items than will fit on the display, press or to scroll up or down.

Select a camera icon to display a photo

of the item. If the photo is too big to fit on the display, press , , or to scroll the photo.

Select Tide Station to display a tide chart for the position (see section 13).

iiSelect other items or press to return to the chart.

To see stored information about nearby symbols

press and select Chart info. Then follow step 3 above.

22 Northstar Explorer 657 Installation and Operation Manual