The YSS Heitan, NA-X2-001 is a Heitan-Class (1B) Carrier built at Chiharu no Iori by Ketsurui Fleet Yards in YE 32 for the Star Army of Yamatai's Second Expeditionary Fleet. She is commanded by Taisa Numa Atsui and is a veteran of the Battle of Yamatai.

The YSS Heitan serves as the back drop for the 21st Squadron - Fighting Diamonds plot. The information here is provided for when the squadron is aboard the carrier.

• Crew Roster
• Modifications and Interiors
• Emblem, Motto, and History
• Fighter Complement

• Heitan-class Carrier
• 2XF Operations, Second Expeditionary Fleet, Star Army of Yamatai
• Second Mishhuvurthyar War