Moore, AnnaDekany, RichJones, DamienSmith, RogerTaylor, KeithVelur, Viswa2026-01-022026-01-02081946334597808194633400277-786XORCID:/0000-0002-2894-6936/work/198503800https://hdl.handle.net/1885/733802625The Gemini/Subaru WFMOS project has given the stimulus for considering new concepts for massively multiplexed fiber positioning schemes. The problem of acquiring many thousands of objects within a ∼1.5° field at Subaru's ∼f/2 prime-focus station represents a challenge to normal concepts of fiber positioning. Solutions usually involve imposing limits to the patrol field of each fiber. Using this simplification, a new concept is proposed which moves objects onto a fixed array of fibers rather than moving the fiber themselves. Such a scheme may simplify the manufacturing and assembly processes and may result in a more robust solution compatible with the challenging prime-focus environment. We describe the POSM concept and present an initial opto-mechanical layout.10en200610.1117/12.67262533749342339