When boating on coastal waters it is important to be aware of the tides why?

Tides cause water levels to rise and fall.

Explanation:

When boating in coastal waters one must have the effect of tides in mind. Usually, changing tides are predictable, as variations commonly appear twice every day at around six-hour intervals. The rise and fall of tides can change water levels by a lot, and strong currents may also develop. Tidal currents can get so strong that a boat may not be able to make headway against it.

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for many centuries there were important factors which the economies of the muslim empires developed increasingly. they applied economic procedures in production, investment, finance, taxation and property. they used to tax certain goods (for example: harvest), they charged interest on money lent, they signed contracts with merchants; they relied on a common currency, and they used checks as well as promissory notes. with the money collected by means of taxation, the government provided the needy with an income. in addition, trading networks covered huge distances, so far regions started to have contact and exchange goods. this trade network covered areas of asia, africa and europe.