The amount of freshwater used globally is tiny in comparison to the salt water in the oceans.
In case we desalinated the entire amount of consumed freshwater and dumped all the salt from that in the oceans, it would be impossible to even detect a rise in the oceans salt levels, provided that it was distributed properly and not just dumped in one location.
Water is also a cycle. It eventually returns to the ocean one way or the other after we've used it. With proper planning, we could theoretically borrow the water and mix the salt back in when it's returned to the sea.
104 comments on how to memorize starboard and port as right and left.
I have an even better way to know : Just fucking remember it.
It's not that difficult.