I have found something in Ravenfield(Attack Boat Update?)

By the time i play this map Dustbowl,i immediately finds out something... Sorry for no intro because working on a new intro Mods link:https://drive.google.com/u/0/uc?id=14mzP1RCG86R0W7hAnLDU_dHQDwS_wrM8&export=download