Which is an optional runway spacing configuration for the Type-H?

The correct choice is 150-300 Ft, which reflects a specific range that is recognized as an optional runway spacing configuration for the Type-H. This spacing is designed to accommodate various operational needs, ensuring a balance between safety and efficiency during takeoff and landing phases, particularly in environments where multiple aircraft may be using the runway system.

The configuration's flexibility allows for adjustments based on factors such as aircraft size, operational procedures, and air traffic conditions. This range not only supports the aerodynamic properties needed for effective aircraft departures but also takes into consideration the necessary safety margins for separation between planes, especially in busy air traffic.

In contrast, the other options do not fit the specified parameters for the Type-H runway spacing configuration as widely recognized and applied in the aviation community. They either exceed the recommended range or fall below it, which can lead to potential safety issues and operational inefficiencies. For instance, spacing that is too tight could increase the risk of incidents during critical flight phases, while spacing that is too wide could lead to underutilization of airport resources.