Example: 
, T=10sec
Need to plot 
and C w.r.t. d
For d=5ft
In order to guess range of d assume shallow water: 
Then: 
shallow water
unrealistic situation!
However let's continue calculation to determine d and breaker height H.
(deep water), 
(shallow water)
Replacing (41) in (40) and rearranging gives:
or
( 
=H at breaking)
