Raymarine Marine GPS System manual Collecting Data, Entering and Editing Data

Advanced Navigator Functions

Collecting Data

The accuracy of the analysis presented by Polars depends upon the volume and accuracy of the data collected. There are two primary areas within Polars where you can enter and modify data: the Polar tab and the Data tab (Figure 5-13). The Polar tab displays the Polar Parameters screen, which contains variables/values used to plot the Polar graph. The Data tab displays the Data Tests screen, which enables the input of advanced, boat/weather performance-related information that you can use to further fine-tune the analysis.

While these screens come pre-loaded with default data, it is essential to replace as much of this information as possible with real performance/ atmospheric-specific data. You can use Navigator’s DataTrak and Data Logging utility programs to record a wide variety of performance- related data that is ideal for use with these secreens. Data for these screens can also come from such sources as your boat’s manufacturer and local nautical organizations.

Entering and Editing Data

This section explains how to enter data into the Polar Parameters and Data Tests screens, how to the edit individual variables, and how to apply and save your changes.

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