Considering-the-operational-application-and-the-characteristics-of-equipment-performance, and-based-on-the-analysis-to-the-horizontal-reconnaissance-scope-and-the-precise-direction-finding-zone-of-dual-shipborne-UAVs, models-of-dual-aircraft-feasible-locating-area, dual-aircraft-effective-precise-location-area-and-maximum-inscribed-rectangle-in-dual-aircraft-effective-precise-locating-area-were-established, and-the-relationship-between-dual-aircraft-effective-precise-locating-area-and-equal-circular-error-probable-curve-was-analyzed. Practical-conclusion-was-obtained-by-simulation, which-provides-a-decision-making-basis-for-optimal-configuration-of-search-power-when-destroyer/frigate-formation-adopting-dual-UAV-passive-locating.