x, Y,Z 
Wave Forces 
on a Restratned Shtp tn Head-Sea Waves 
-£— (20, U/g + 1) 
U 
length of ship. 
coordinate-axis in the direction of the out- 
ward normal on the wetted surface of the 
ship. 
stretched coordinate (see (24) ). (Can also 
mean a number. ) 
coordinate-axis normal to and out of a cylin- 
der with the same cross-section as the ship 
at a given section. 
i=1, 2, 3: the x-,y-,z- component of the 
unit normal vector to the wetted surface of 
the ship. 
radial coordinate used in the chapter : 
"Numerical Calculations" (see Figure 2). 
time variable 
draft of the ship midships. 
forward speed of the ship. 
Cartesian coordinates (see Figure 1). (The 
ship moves in the direction of the negative 
X-axis, zZ is measured upwards, y to 
starboard), 
stretched coordinates (see (24) or (71) ). 
vy -k 
v 
| where k is an integration variable. 
very small positive number. 
very small positive number. 
very small positive number. 
1809 
