Operation Crystal Sea is a persistent, open world PvE/PvP playground for the English Channel WW2 map. This mission uses similar mechanics to what Operation Snowfox uses for the Persian Gulf map. The mission utilizes Moose functions and custom scripts which have been included in the mission file. To allow the mission to provide persistency, it is necessary to de-sanitize 'lfs' and 'io' in MissionScripting.lua. The mission will still be able to run without this, but persistency won't happen.