Exploring large hierarchies is still a challenging task, especially for handheld tactile devices, due to the lack of visualization space and finger's occlusion. In this paper, we propose the RICHIE (Radial In-Cremental HIerarchy Exploration) tool, a new radial widget that allows step-by-step navigation through large hierarchies. We designed it to fit handheld tactile requirements such as target reaching and space optimization. Depth exploration is made by shifting two levels of hierarchy at the same time, for reducing the screen occupation. This widget was implemented in order to adapt a Command and Control (C2) system to mobile tactile devices, as these systems require the on-screen presence of an important unit's hierarchy (the ORder of BATtle). Nevertheless, we are convinced that RICHIE could be used on several systems that require hierarchical data exploration, such as phylogenetic trees or file browsing.