Hello, I'm an expert in environmental science with a focus on water resources. When it comes to drinking rainwater at sea, there are several factors to consider.

Firstly, rainwater is generally considered to be clean and safe to drink because it originates from the Earth's atmosphere. However, the safety of rainwater can be compromised by various factors such as air pollution, which can lead to the presence of contaminants.

At sea, rainwater can be collected and used, but it's important to ensure that it's collected properly to avoid contamination from the sea itself or from the ship's environment. For instance, if a ship is burning fuel, the emissions could contaminate the rainwater as it falls.

Additionally, the storage of rainwater must be done in a clean and sanitary manner to prevent the growth of bacteria or the introduction of other contaminants.

In summary, while rainwater at sea can be a valuable source of fresh water, it should be treated with caution and proper collection and storage methods should be employed to ensure its safety for consumption.

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If it is encrusted with dried salt, wash it in seawater. Normally, a small amount of seawater mixed with rain will hardly be noticeable and will not cause any physical reaction. In rough seas you cannot get uncontaminated fresh water. ... When it rains, drink as much as you can hold.read more >>