Once was considered safest
Alcohol stoves were once considered the safest type, but now many people are terrified with them. If used with care they still are safe. The biggest chance of a flare up is not when first lighting, but trying to relight if it has been blown out. If it blows out from the wind, excess fuel can gather under the burner and cause a huge flare up if you try to relight right away. Always check for this! Occaisional small flare ups can occur, but the flame is quite cool, like sterno, and unless there is a huge amount of excess fuel, water will put it right out. If there is a large amount of fuel, then water will just wash it around and make it spread. Please try to get good instructions on use for your own safety. If you learn to use it, it can still be OK for light duty or occaisional use, but if you need to use the stove often, you will probably enjoy a stove with higher btu output. I rarely used the alcohol stove on my old C30, instead we used an electric hotplate at the dock or a small butane burner while at anchor like those sold at West. We didn't cook much, mostly just water for coffee.