The MSN-001A1 Delta Plus was an Earth Federation Forces mobile suit introduced in the novel and OVA Mobile Suit Gundam Unicorn.
The Delta Plus was a prototype Transformable Mobile Suit (TMS) developed by Anaheim Electronics. Based on the development plan of the MSN-001 Delta Gundam, the Delta Plus incorporated technologies from the Zeta series of mobile suits, as well as operating data from the MSN-00100 Hyaku Shiki. It was developed as an all-purpose attack machine, capable of operating both in space and in the atmosphere. Like the MSZ-006 Zeta Gundam, the Delta Plus was capable of transforming into a Wave Rider Mode with the ability to enter the atmosphere unassisted. The Wave Rider Mode's thrust was high enough to not only achieve atmospheric flight, but also serve as a Sub-Flight System for another mobile suit under 1G of gravity.
The Delta Plus adopted a unique layout that concentrated all of its thrusters on the lower body and had no thrusters on its back. Its legs, which functioned as the main thrusters in Wave Rider Mode, were only equipped with minimal armor. This was because it prioritized mobility over durability, a design concept proven by the Hyaku Shiki. Its head sensor adopted an updated version of the IDE (Image Directive Encode) System used by the Hyaku Shiki, with scan lines appearing on the sensor when activating or switching between modes. Like its predecessor, it had a pair of dual eye sensors deep underneath.
Most of the Delta Plus' weapons were stored in its shield, including a fixed beam cannon at the front, a 2-barrel grenade launcher, and two beam sabers that could function as beam guns when stored. The shield served as the Wave Rider Mode's main weapon and sensor. Its standard handheld weapon was the Long Mega Buster, but due to E-pac compatibility issues, the unit assigned to Londo Bell in U.C. 0096 used the same beam rifle as the RGZ-95 ReZEL. Finally, it was armed with a pair of head-mounted vulcan guns. Unusually, a simplified Psycommu device known as the Bio-Sensor was installed at the request of the Earth Federation Forces. While this system was believed to enhance the responsiveness of the mobile suit, it had limited effectiveness when used by regular pilots.
