Abstract: In maritime aerospace tracking and control missions, shipborne radar device signals are easily obstructed by ship structures, affecting signal qualities and measurement accuracies. Signal obstruction is an important consideration in the design of measurement condition for maritime tracking and control mission and is also a key issue that requires continuous attention during mission execution. Current methods for analyzing shipborne radar device obstructions are introduced in this paper. To address the shortcomings of those methods, such as low accuracies of calculation models and non-intuitive result displays, a real-time detection method for signal obstruction based on graphics engine collision calculations is proposed, and a real-time detection system for shipborne radar device obstructions is developed. The system simulates the radar operational status through the introduction of tracking and control data, and describes radar beam coverage and hull obstruction environments using K-direction orientation polytopes for collision calculations, achieving real-time accurate analysis and visualization of obstruction scenario. Experiment results demonstrate that the system can provide technical support for monitoring equipment obstruction and making corresponding adjustments in tracking and control missions.