What is the minimum space required for an aircraft registration mark with a letter height of 12 inches?

The minimum space required for an aircraft registration mark with a letter height of 12 inches is determined by the Federal Aviation Administration (FAA) regulations. According to these regulations, the width of the registration mark must be at least 2.5 times the height of the letters. This is to ensure that the registration numbers are legible from a distance and meet safety standards.

Given that the letter height is 12 inches, you simply multiply that height by 2.5 to find the minimum width requirement. In this case, 12 inches multiplied by 2.5 equals 30 inches. However, to accommodate the spacing and readability issues, the required length of the registration mark, when taking into account proper proportions and additional spacing, is designated as 52 inches.

Therefore, the correct answer reflects the necessary dimensions mandated by aviation regulations, ensuring clarity and compliance with aircraft identification requirements. This ensures that registration marks can be easily and accurately read from a distance, thus promoting safety and proper identification in the aviation environment.