Getting lost at sea is a nightmare no one wants to face. Tales of people surviving after months only serve to remind us how unforgiving the open waters can be.

Then there are those who were never found.

Food, maps, water, and other supplies can only last a drifter for so long. Then there’s the mental, emotional, and physical toll on the body. The odds of being rescued are slim, while the chances of death are high.

Read on for some of the more harrowing stories of people lost at sea.