Question

a rainbow in the morning is the sailor's warming?

Answer 1

Ever since people tried to navigate the seaways, the prevailing weather has always been very crucial to the success of expeditions. To steer away from trouble like storms and hurricanes, obviously, but also to put to service natural resources long before wind and solar energy were standard terms. With tall ships completely dependent on wind to carry on with their businesses, the understanding of trade winds was the obvious subject of ‘weather forecasting’. Thus, early on, a thorough understanding of and a diligent attempt to forecast the weather elements had to be part of any good navigator’s skill set.

Answer 2

Rainbow is formed when there is rain on one side and sunshines onthe other. It formed when sunlight is refracted as it enters the raindrop. The different wavelenghts of the visible light spread out because of this refraction. A rainbow inthe morning is the sailor's warning is a ancient rhymes which means; clouds  typically move from west to east in the middle latitude, th rainbow is formed on the west as sun is inthe east. which means clouds and showers willmove eastward and it will possibility of rain soon. Therefore it said that rainbow in the morning is the sailors warning.