Falttnsen 
spread along the line y=2z=0, - L/2 <x < L/2. A two-term 
inner expansion of this two-term far-field expansion can be obtained 
from (65). 
It is 
ey dtc, eee ke 
ig, ek aii 2wt 2 Uy, ar 
In the same way as for the zero-speed problem we will find 
that 2 satisfies 
Een S: 2| = 0 (84) 
ier azine | ¥, 
Ae ey ieR es n Z=0 (85) 
a2 Be ‘ i 
on the submerged part of the body (86) 
In addition yy, must match with the far-field solution. 
Ursell (1968 a) has derived a solution to (84), (85) and (86). 
It can be written as 
1796 
