While the vast majority of good survival watches are submergible up to a certain depth, you shouldn’t assume they all are. If you need a watch you can submerge in water, check the product’s listing before you buy it. If it doesn’t say it is waterproof or water-resistant to a certain depth, assume that it probably is not. Also, it is worth knowing that many watches advertised as water-resistant cannot have their buttons pressed while they are underwater.