4. Color of the water Colour of the water surface Estimate the Forel-Ule colour scale by looking at the water surface, away from sun glitter.
Keeping the sun diagonally behind you over your left or right shoulder, look down and forward to the water surface (40-45 degrees) and compare the colour of the water to the Forel-Ule index. Optionally upload another photo using the same viewing angles.
Step 5