Vassilopoulos and Mandel 



philosophy of Professor Abkowitz in the discussion of the equations of motion 

 contained in this paper. Most of the material used in the analysis of added 

 mass and damping was kindly provided by Professor Porter. 



Mrs. Barbara Allen of our Department at M.I.T. was most patient and co- 

 operative in typing the manuscript of this paper. To her we extend our deep 

 thanks. 



NOMENCLATURE 

 English Letters 



a = coefficient of equation of motion 



A = coefficient of equation of motion 



A = amplitude ratio 



b = coefficient of equation of motion 



B = breadth of ship or model 



B = coefficient of equation of motion 

 B*, B(x) = station breadth of ship or model at designed waterline 



c = a constant = -np/s 



c = coefficient of equation of motion 



C = coefficient of equation of motion 

 Cg = block coefficient of ship or model 

 Cp = prismatic coefficient of ship or model 

 Cfl, = waterplane area coefficient 



d = coefficient of equation of motion 



D = coefficient of equation of motion 



e = coefficient of equation of motion 



E = coefficient of equation of motion 

 Fr = Froude number 



F = total external force 



348 



