You wish to communicate information that the swell in your area is 8-10 feet in height and from the northeast. How would you describe this swell, as defined in the International Code of Signals?

Correct Answer: Option D — moderate

International Code of Signals wave and swell measurement definitions categorize swell heights between 6.5 and 13 feet (2 to 4 meters), such as 8-10 feet, under the standard descriptive term 'moderate'.