Overall meaning : It is Allah who has subjected the sea to you, people, so that ships may sail upon it by His command, that you may seek His bounty and earn your livelihoods, and that you may give thanks to Him for His favours. He has also subjected to you all that is in the heavens and the earth for your own benefit. All this is from Him and by His grace. Surely in this there are signs of Allah’s power and oneness for people who reflect.

Tell the believers, Muhammad, to forgive the unbelievers who deny a severe punishment awaiting them for the harm they cause them and to bear with them, so that He may punish their enemies for the sins they have committed.
Whoever does good in this world—showing obedience to Allah—does so for his own good; and whoever does evil—through unbelief and sins—does so to his own detriment. Then to your Lord will you all be returned to repay you for your good and evil deeds.