Dear Caty and All,
I see on the Chart of some products as Haiyang, Samyung ENC, ... Their chart can show the arrow grid with the peak of grid when we move the cursor to it, we can see some value that relate with the current as: time, date, direction of current, value of direction, and so on. I think we can update these parameter to IMG Garmin Map by using the current model in NOAA data. But I dont know how to do. Pls show me the detail to do it. Thanks so much!