Which of the following expresses the elevation limits most accurately?

Which of the following expresses the elevation limits most accurately?

• A. -25 + 80
• B. -25 to +80 degrees
• C. -20 to +60 degrees
• D. -30 to +60 degrees

Answer: (B)

Elevation limits describe the range of angles allowed relative to the horizon, from a lowest point below the horizon to a highest point above it. They’re written as a lower bound to an upper bound, with negative values indicating downward elevation and positive values indicating upward elevation. The expression -25 to +80 degrees is the most accurate because it clearly shows a lower limit of -25 degrees and an upper limit of +80 degrees, capturing the full span around the horizon. The format uses “to” to denote a range, which is the standard way to express limits. The alternative written as -25 + 80 would be read as a simple arithmetic result rather than a range, making it ambiguous. The other ranges (-20 to +60 and -30 to +60) do not match the specified limits and omit portions of the allowed elevation.

Elevation limits describe the range of angles allowed relative to the horizon, from a lowest point below the horizon to a highest point above it. They’re written as a lower bound to an upper bound, with negative values indicating downward elevation and positive values indicating upward elevation.

The expression -25 to +80 degrees is the most accurate because it clearly shows a lower limit of -25 degrees and an upper limit of +80 degrees, capturing the full span around the horizon. The format uses “to” to denote a range, which is the standard way to express limits. The alternative written as -25 + 80 would be read as a simple arithmetic result rather than a range, making it ambiguous. The other ranges (-20 to +60 and -30 to +60) do not match the specified limits and omit portions of the allowed elevation.