No. Although both the Skywatch and Skywatch HP use the same antenna, optional display and processor mounting tray, the processor connector is different. In order to upgrade a Skywatch system the Skywatch HP system, you must change and wire the 100 pin connector for the HP processor. In addition, the HP processor uses a configuration module for parameter settings while the original processor used strappings. The HP processor can also accept an analog radio altitude input for aircraft so equipped.