Certain starships can perform special functions. For example, there are a number of cloaking ships that can move without being seen, and some alchemy ships.
While the original HOST program and earlier versions of PHost had these functions keyed to certain hull types, PHost 3 and later allow you to assign these functions manually. PHost 4 even allows you to assign functions to individual ships, not just hull types.
This document describes all the hull functions supported by PHost and how they can be operated by the player. It also describes how hosts can configure these functions.