Laylines Settings; Polar Tables; Importing A Polar Table Manually - Garmin GPSMAP 12 3 Series Owner's Manual

Laylines Settings

To use the laylines features, you must connect a wind sensor to the chartplotter.
When in sailing mode (Setting the Vessel Type,
Laylines can be very helpful when racing.
From the Navigation chart, select Options > Layers > My Vessel > Laylines > Setup.
Sailing Ang.: Allows you to select how the device calculates laylines. The Actual option calculates the laylines
using the measured wind angle from the wind sensor. The Manual option calculates the laylines using
manually entered windward and leeward angles. The Polar Table option calculates the laylines based on the
imported polar table data
Windward Ang.: Allows you to set a layline based on the windward sailing angle.
Leeward Ang.: Allows you to set a layline based on the leeward sailing angle.
Tide Correction: Corrects the laylines based on the tide.
Layline Filter: Filters the layline data based on the time interval entered. For a smoother layline that filters out
some of the changes in the boat's heading or true wind angle, enter a higher number. For laylines that display
a higher sensitivity to changes in the boat's heading or true wind angle, enter a lower number.

Polar Tables

This feature allows you to load and use data from a third party. Garmin makes no representations about the
accuracy, reliability, completeness or timeliness of the data generated by third parties. Any use or reliance on
data generated by third parties is at your own risk.
You can use polar table data with your chartplotter. You can assign polar data types in data fields, and you can
use polar data to calculate optimal laylines and starting line guidance.

Importing a Polar Table Manually

If you save the polar table file as polar.plr and place it in the Garmin/polars/ folder on the memory card, the
chartplotter imports the data automatically after you insert the memory card. If it does not import the data
automatically, or if you want to load a different set of data, you can initiate the import manually.
1 Save the polar table file (polar.plr) to the Garmin/polars/ folder on the memory card.
2 Insert the memory card containing the polar data file into the chartplotter
3 Select Settings > My Vessel > Polar Table > Import from Card.
4 If necessary, select the card slot and the polar table file.
62
page 10), you can display laylines on the navigation chart.
(Importing a Polar Table Manually,
WARNING
page 62).
(Memory Cards, page 7).
Sailing Features