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Northstar Explorer 657 Installation and Operation Manual64
Projected course
The 657 can estimate the course after a given time, based on the current speed and heading (see
section 3-4). The options are 2 minutes, 10 minutes, 30 minutes, 1 hour, 2 hours or Off
CDI scale See Appendix C. The options are 0.05, 0.1, 0.2, 0.5, 1.0, 2.0, 4.0 and 10.0 distance units
Lat/lon grid
Displays a latitude and longitude grid
Boundaries Displays boundaries around areas where more detailed chart coverage is available:
Auto shows the next four detail levels; On shows all
Text/icon size Select the size of chart text and icons
Water submenu
Water features
Displays marine sediment labels (for example, M shows areas of mud) and tide station icons
Bathymetrics Displays underwater depth contours between Bath & sndgs min and max
Spot soundings Displays depth soundings between Bath & sndgs min and max
Bath & sndgs min The minimum depth for Bathymetrics and Spot soundings
Bath & sndgs max The maximum depth for Bathymetrics and Spot soundings
Tidal flow
Displays dynamic tide flows: arrows on a chart showing the present tide stream and
orientation (requires a GPS fi x and an NT-MAX card)
Land submenu
Land features
Displays land features, for example regions, rivers, roads, railways, airports
Land elevation
Displays land contours, shaded like depths (requires an NT Max card)
Other submenu
Waypoints Displays waypoints: Hide all only displays waypoints on any selected route; Selected
displays waypoints with their display option set to Icon or I+N (Icon and Name) (see section 5)
Names
Displays place names
Lights Light House display options: Off hides all light indicators (the icon still shows); No sectors hides
sectors; On shows sectors; Animated activates light animation.
Note: with light animation enabled sectors are not visible, animation only operates in single
chart view or in the top chart of chart + chart
Nav-aids Displays signals (fog, radar, radio stations) and bouys. Int and US select the icon format;
Smpl draws simpler icons
Attention areas
Displays attention area boundaries and information icons ; attention areas are important
areas, such as restricted anchorages or shallow areas