Complex sentence: Murray Field and Eureka Municipal Airport, are general aviation airports for private and charter air service, and are both located adjacent to Humboldt Bay either at the edge of Eureka or just outside the city limits.
Split into simpler sentences: Murray Field and Eureka Municipal Airport, are general aviation airports for private and charter air service. Both are located adjacent to Humboldt Bay either at the edge of Eureka or just outside the city limits.