The Forecasting Problem for a Sea Surface Represented by Infinitely 
Long Crests, a Gaussian Wave Record, and Winds that last Ds Seconds 
Over a Fetch of Length, F. 
Ft " | o<t<p,+ Ht (751) 
Le es O otherwise 
Me PEX 
t; = <f= (GS2Z) 
a Mpa mens (753) 
g g 
t, < fe ile (7.54) 
gt . 
flu Se (755) 
top D 
poe (756) 
G(top Ds) — , -G for (WS) 
ee 
= =A = g g ob 758 
a a BIXtF) * x(xtF) ( ) 
gD, , GF (top- Ds) 759 
Op = Oy oD ( ) 
" if Wow) Zines 
S, letGile = g 2(x+F) = (760) 
O; otherwise 
Gite mea De 
2 it cals 
1, 204+F + g(De~ ton) alttos 8) Dsl eilltout t)-O5 
eile Othe 2(F EL Sh on 2GcEE) 
S.FG.F=4 | if glit ve parle eg (to #) 
eal cae 
-2xu+ Gt 
5 rll ate F), saith 
' alta BY). 
O ; if er ee (761) 
PLATE XXII 
—1I59— 
