申論題

3. Based on the Douglas sea scales, The following are parts of the tables of the state of the sea (The wind generated waves) and the state of swell Wave length (L) name         Wave height (H) name
Short wave 100 m -             Low wave 2 m -
Average wave 100-200 m    Moderate wave 2-4 m
Long wave 201 m+              Heavy wave 4.01 m +
Remark: The sea (name & degree) are decided by the wave height H,checking from the Table 1 directly.The swell (name & degree) are decided by combining both of
the name of wave length & the name of wave height, which can be found below the Table 2, then check inside the Table 2 with this two names, finally fix the swell name & degree.
The following wave was what you observed at sea :

Wave length (L= 80 m) and Wave height (H= 3 m)

(1) What is the sea degree of this wave? How to express it?