How long can I survive drinking salt water if I'm stuck in a sea/ocean?
Drinking salt water is not at all good for health that can have negative immediate effects. Sudden severe diarrhea is possible, as well as more frequent urination and headaches. The more salt water you drink, the harder it is on your kidneys to process the excess salt, and you can also cause kidney damage and even failure that may lead to complete dehydration and then pathetic death. I sailed a number of time and I use to drink ocean water just like that, I did not felt bad may be because I was unaware of consiquences and mind never gave me a signal of nausea or diarrhoea. Therefore, I advice you not to take any risk .
Drinking seawater can be deadly to humans. ... Human kidneys can only make urine that is less salty than salt water. Therefore, to get rid of all the excess salttaken in by drinking seawater, you have to urinate more water than you drank. Eventually, you die of dehydration even as you become thirstier.
So as a total conjecture you would be live around 15 days and up to 20 days highest depends on your body structure whether u r petite or fluppy type
Because I had read Dr. Alain Bombard's tale of surviving on seawater, I decided to search a bit more, and came up with this website: The Effects of Drinking Sea Water - Is it Safe? It comes out as yes, no, not really depending on.....
As an example of sheer tenacity and survival, do read Steve Callahan's "Adrift: Seventy-six Days Lost at Sea" mentioned in the above-mentioned website. It is a gripping story. He did not give up.
You would have to improvise a still to purify the sea water, you cannot safely drink sea water at all, it is 3% sodium chloride, and causes you to vomit.
You need to improvise a solar still with whatever materials you have around you. This is the simplest way I have seen, you tube has many more suggestions.
Not long at all. You will survive much longer drinking nothing. But if you can somehow rig a solar still to distill water from the sun's energy, food and exposure will be your chief survival problems.