[CA11] Polars table for Lighthouse II

[daknecht]

I am trying to create a Polars table for my boat to upload to the e95 chart plotter. The diagram I have that shows the interaction of angle, wind speed and boat speed is giving speed as VMG. The sample table in the manual just says target boat speed. Is it expecting VMG or actual boat speed? Thanks- Dave

[Chuck - Raymarine - Moderator]

Welcome back to the Raymarine Forum Dave,

TWS should be true wind in knots.
TWA should be true wind angle in degrees.
BSP should be optimal boat speed (STW) in knots.

A very good article addressing the dependency of True Wind on speed through water, not SOG, and Polars may be found here.