Garmin GPSMAP 12 3 Series, Owner'S Manual, Page: 75 / 208

Showing Polar Data in Data Fields
Before you can view polar data, you must import a polar table from a memory card ( Importing a Polar Table
Manually, page 62 ).
1 Open the screen to which you want to add polar data.
2 Select Options > Edit Overlays.
3 Select the data field to change.
4 Select Sailing.
5 Select the polar data to display in the data field.
• To show the boat speed from the polar table at the current true wind speed and angle, select Polar Speed.
• To show the optimal boat speed at the target wind angle, select Target Speed.
• To show the optimal wind angle at the current true wind speed, select Target True Wind Angle.
• To show Target TWA converted to apparent using target speed, select Target App. Wind Angle.
• To show the difference between the current boat speed and the optimal boat speed shown as speed,
select Δ Polar Speed.
• To show the difference between the current boat speed and the optimal boat speed as a percentage,
select Δ Polar Speed Percent.
• To show the difference between the current boat speed and the target boat speed shown as speed, select
Δ Target Speed.
• To show the difference between the current boat speed and the target boat speed shown as a percentage,
select Δ Target Speed Percent.
• To show the difference between the true wind angle and target true wind angle, select Δ Target True Wind
Angle.
• To show the difference between the apparent wind angle and target apparent wind angle and the true
wind angle, select Δ Target App. Wind Angle.
TIP: You can also use the polar table data when calculating laylines and starting line guidance.
Sailing Features 63