Wind and wave charts sea surface temperatures

The wind and wave chart shows characteristics of sea waves and wind.
The combined sea heights are depicted in solid contours.
The relative minima or maxima combined sea state values are enclosed in a box.
Wind speed and direction are also indicated.
The wind speed is shown in knots. Each bar indicates 10 knots and
each half bar 5 knots.
Sea surface temperature charts show mean temperature values for a week,
10 days or a month.
Ice edges are also depicted.
Some transmissions also contain sea temperature anomalies.