Instrument: Chart viewer

The Chart viewer provides a graphical view of a chart, a representation of the current position, as well as any loaded waypoints, tracks, and routes.

The Chart viewer will show the currently loaded chart, or a blank screen if one is not loaded. Overlayed on the chart are a number of useful features:

If a chart is loaded, it's name and a brief description of the chart will be shown across the top.
The Zoom control panel is at the bottom. It shows the current zoom level and allows you to zoom in and out.
In the bottom right corner is a small green box showing the latitude and longitude of the position of the mouse pointer when it is over a chart.
In addition to displaying charts, the Chart viewer allows you to place, move, and edit waypoints and routes by simply dragging them with the mouse or with a detailed position editor. The name of the waypoint or route is shown if the mouse hovers over it.

Just like with any other instrument in Mariner, clicking the right mouse button will show the options:

Select chart... will display the following choices:
- ...from list will pop open a new window. On the right is the list of available charts and on the left is a setting for manual or automatic chart selection. There are several possible combinations of settings:
  - Selecting manual and a chart from the available list will display that chart.
  - Selecting automatic and NOT selecting a chart from the list will cause the system to attempt to find and display the most detailed chart containing the current position. If the current position is unknown or is not on any available chart then no chart will be selected.
  - Selecting automatic and then choosing a chart from the list will act as a hint to the system. If the chart selected contains the current position then it will be displayed. If it does not then the hint will be ignored and the system will default to the fully automatic behavior as described above.
- ...for position or waypoint will pop open a new window that will allow you to select the best available chart for a given position. The position may be either the current GPS position, any loaded waypoint, or latitude/logitude coordinates.
- ...smaller scale will switch to a chart that is at a lower scale (and thus is more detailed) if one exists in the system.
- ...larger scale will switch to a chart that is at a higher scale (and thus is less detailed) if one exists in the system.
- ...alternate at current GPS position will switch to the next best chart at the current GPS position. Mariner will always attempt to provide the best (most detailed) available chart for any given position.
- ...alternate at current mouse position will switch to the next best chart at the position currently under the mouse. Mariner will always attempt to provide the best (most detailed) available chart for any given position.
Select chart colors is available for KAP format charts only. This will allow you to choose the color pallette the chart is displayed in. The pallettes available depend on the particular chart but generally include "Paper Chart", "Night", "Day", "Dusk", etc.
Print current view will print the currently displayed section of the chart. The chart will be scaled appropriately to fill the paper specified.
Print whole chart will print the whole chart. The chart will be scaled appropriately to fill the paper specified.
Show active track selects whether the currently active track should be shown.
Show currently loaded tracks/marks selects whether any loaded tracks and loaded marks should be shown. To select individual tracks and marks to show see the next menu selection
Select loaded tracks/marks to show selects individual loaded tracks and loaded marks to be displayed.
Show zoom panel controls the display of the zoom control panel at the bottom of the Chart Viewer window.
Show chart name controls the display of the chart name and description at the top of the Chart Viewer window.
Show current position controls the display of the boat symbol at the current GPS position.
Center map on position controls whether Mariner should continuously adjust the chart display so that the current position is visible. If this option is turned off then the chart will not follow the current position and if the current position falls outside the chart will not automatically load the appropriate chart.
For an explanation of other standard instrument options click here