Safety on a boat
Although it happens in a setting with a variety of prospective risks, sailing is a relatively secure statistically.
Knowing your boundaries is the key to remaining secure, which ensures you can take care of yourself and your crew without bringing your vessel into circumstances it was not designed for, or putting yourself in a situation where there is a danger of exhaustion or cold.
Expert sailors have an almost instinctive feeling that warns them when they might be challenged by circumstances. Newcomers will need to be much more conscious of the variables that could lead to this occurrence and of how to remain safe.
It's also essential to be able to recognize and avoid situations that you still don't have the skills to handle — education is important.