The Seamoth Perimeter Defense System is a defense-oriented Upgrade Module for the Seamoth. The module is crafted in the Vehicle Modification Station and must be applied to the Seamoth's upgrade panel to function. It must be noted that killing aggressive fauna such as Stalkers and Sand Sharks is rather difficult without a large number of fully-charged blasts, which is highly costly on a Seamoth's energy reserves. Often, the better solution is to use a low-mid charge shock, which will stun predators and allow one with time to escape.