The paper presents a low cost Heads Up Display (HUD) which was specifically developed to support multiple configurations of high fidelity flight simulators. It begins by discussing the basic requirements for HUD simulation, from presentation of the HUD image to replication of the combining optics. The paper presents the traditional high fidelity approaches, e.g. using modified aircraft devices, typically the highest cost approach but providing the highest fidelity and realism, and superposition of the HUD imagery on the Out-the-Window visual scene, which is the lowest cost approach and provides the lowest level of realism. Problems, complications, advantages and disadvantages of these approaches are discussed. The paper then describes the HUD device that was recently developed by HTI specifically for simulator applications. It discusses the reasoning for developing such a device and the design criteria used. The system diagram and major components are presented which include: holographic combiner, optical system, high resolution raster scan monitor, pilot control panel, and mechanical housing. The design considerations for tailoring the device to different simulation requirements such as field of view (e.g. LANTIRN HUD, WAC HUD, etc.), collimation distance, and mechanical presentation are presented. A photograph of a production device is provided. Performance characteristics including field of view, brightness, contrast, resolution, and viewing volume are presented along with other characteristics such as video interface and weight. Finally, a comparison of the advantages, disadvantages, and cost of all three approaches is presented.