Slight thread drift - never used one but Katadyn and salt water escape piqued my interest...for those with deep pockets...KATADYN SURVIVOR 35...stashed on a boat might be useful.
The most widely-used emergency desalinator. Produces up to 4.5 litres per hour. Produces enough water for multiple person liferafts. Widely used by US and international military forces, voyagers, sea kayakers, and other adventurers.
https://www.katadyn.com/us/us/140-80...yn-survivor-35