Designed by Evan K. Marshall, the 120 is a trideck design with a 25-foot beam. She includes some unexpected features. Notably, there's a main-deck master suite, and a bridge-deck captain's cabin. There's also a tender garage for a 16-footer, rather than open space on the uppermost deck. When Ocean Alexander first announced the project, in 2010, it promised a "revolutionary" helm design, too, which would become a signature feature for future models. The idea was to place the traditional observation settee in front of the driving position in the wheelhouse, rather than aft of it or to one side. The helm seats and electronics would also be on a raised platform.