METERS 
IN 
HEIGHT OF SWELL, Ho, 
HEIGHT OF SWELL, Hp, IN METERS 
LEGEND 
DISTANCE FROM WHICH SWELL COMES (KM) 
— — — TRAVEL TIME (HOURS) 
—  — WIND VELOCITY IN GENERATING AREA (M/S) 
12 3 14 15 
PERIOD OF SWELL, To, IN SECONDS 
LINE B 
25 
ec 
=} 
° 
=x 
= 
Ee 
~ 20 
= 
= 
- 
aq 
c 
> 
{=} 
ro) 
10 it} 
12 3 
PERIOD OF SWELL, To, IN SECONDS 
Figure 13.—Distance from which swell comes, 
travel time, and wind velocity in fetch as functions of height and period 
at swell at end of distance of decay for two assumed relationships between wind velocity in fetch and duration. 
30 
