🔍 Key Concepts

• Effects of salt water on human hydration and kidneys • Survival at sea guidelines for potable (drinkable) water • Difference between reducing thirst and actually hydrating the body

💭 Think About

• Think about what happens in the body when you drink salt water: does it add usable water, or does it force your body to use more water to get rid of the salt? • Consider whether any amount of undiluted sea water is considered safe in standard survival manuals. • Ask yourself if there is a situation where sea water changes its salinity enough to be considered fresh or nearly fresh.

✅ Before You Answer

• Verify what standard sea water salinity is compared to safe drinking water limits. • Check survival training guidance: do they ever recommend drinking sea water directly, even in tiny amounts? • Consider whether rain mixing with sea water at the surface actually makes the water below safe to drink.