<p>In a shipborne stabilization platform with two platforms, the position of the lower platform is computed based on the twice-integrated accelerometer data. Thus, it is challenging to accurately determine the ship’s position in real time due to complex sea states and measurement errors. This paper deals with the real-time optimization strategy for the target pose of shipborne stabilization platforms with six extendable linkages. Based on a kinematic model of the shipborne stabilization platform, a stabilization index is presented based on the pose of the upper platform. A penalty term that considers the length of the extendable linkage is included in the index to prevent the linkage from exceeding its limit length due to acceleration integration errors or varying sea conditions. Furthermore, a real-time optimization strategy for the target pose of upper platform is proposed. Effectiveness of the strategy was validated through simulations and experiments.</p>