Which ASOS level includes smaller hubs with contract human observers due to poor weather conditions?

The correct answer highlights the structure of the Airport Surface Surveillance Capability (ASOS) levels and their operational requirements. Level B incorporates smaller hubs where contract human observers may be necessary, particularly due to challenging weather conditions that could impair automated surveillance systems. This reflects a need for supplemental human oversight to ensure safety and operational efficiency when automated systems are less reliable.

This level serves as a bridge where a balance is struck between technology and human intervention, acknowledging the limitations that adverse weather can impose on automated monitoring systems. By having contract human observers, these smaller airports can maintain a higher level of situational awareness and safety, which is critical during times of reduced visibility or other weather-related challenges.