MarsGuard Frontier Class Replenishment Ship Class History .The Frontier is the renamed EAS Fitzgerald, an old decommissioned Cotten Class Replenishment ship. The ship was in the first batch of hulls donated to MarsGuard after Mars Independance. The weapons were removed and replaced by Mars produced systems. The ship entered service in 2263 and rarely leaves Mars space. (Note: This is Rich Bax's Cotten SCS. I borrowed it to make this SCS. The original can be found on his site). Frontier Class SCS