When the ocean is still, i.e. there aren't waves that disturb the surface, you often see "lanes" of water that seem flat as opposed to areas where the wind causes ripples. What causes this?
There can be many reasons for the lines that you see where the water is not rippled.
1) There is no wind on those specific areas. Not likely in the photo used as the example but especially when there are cold fronts involved the wind can be very inconsistent over short horizontal distances.
2) You may be seeing the influence of boat wakes that passed over the area recently.
3) You may be seeing variation of the underlying ocean currents. Especially near the coast with tide changes there can be zones of significant ocean current. Wind and ocean currents have an influence on wave height and shape. When the wind blows against the current you get higher steeper waves. When you get wind blowing with the current you get shorter shallower waves (the smooth sections). The currents are not just horizontal but have vertical components as well. The lines identified could be vertical eddies in the current smoothing the surface whereas the smooth / rough line in the foreground is were the major ocean flow is going in opposite directions to each other.
4) If the coast in the foreground is shallow and there are waves coming to shore there then the lines identified to be rip currents caused by water returning from the coast line.
From my personal experience I would say that you are seeing variations in the surface ocean currents, and these currents change how the wind develops waves on the surface.
Expanding on Friddy's third point, this could be the surface signature of what are called internal waves (https://en.wikipedia.org/wiki/Internal_wave). The smooth regions indicate upward motion of internal waves and the rough regions indicate downward motion of internal waves. More information can be found here: http://www.whoi.edu/oceanus/feature/the-waves-within-the-waves
I have gone over these in a fishing boat many times. I often use this as a fish locator with some shoaling fish around the Uk. One side to the other does show a difference in water temps on the temp sensors fitted to the hull. It is my belief that these lanes are caused by differing temperature of water columns and an upwelling on the surface, between the 2 differing density of water. One being warmer than the other causes a density + temp fluctuation and the upwelling on collision. This upwelling caused the flat spots or lanes that can go for miles on times or maybe just a few hundred feet depending on the area at sea. Fish do tend to sit on one side or the other of these marks on the surface that appear dead flat and like river streams, flat on the sea surface apposed to the ripped water - They can be as wide as 20ft or more but often are no more than 10ft or less but are quite long and often going in one direction and then another. So i would say this is more to do with Currents - tidal movements of water and differing water temp columns. I would like to add - That salinity could also be part to play as many river pour into bay areas and i have overserved the flats spots during different stages of a tidal hight. Usually around top water when the water flows slow down some.
My guess is that it may be related to the currents, yes. I suppose that the change in color, is due to a slightly different viscosity of the waters at the lanes, which may affect the reflecting light. I think that if you could catch up swimming inside the lane, you would feel colder water.