A wind with velocity from 4 to 6 NAUTICAL MILES per hour.
Beaufort force 2. Sustained wind speeds in the range of 4 to 6 knots. Small wavelets, still short but more pronaounced; crests have a glassy appearance and do not break.
wind moving 4-7 knots; 2 on the Beaufort scale
In the Beaufort wind scale, a wind whose speed is from 4 to 6 knots (4 to 7mph).
Wind with a speed between 4 and 6 knots (4 and 7 mph); Beaufort scale number 2.