Semisubmerged Ships 559 
REFERENCES 
[1] Boericke, H., Jr., “Unusual Displacement Hull Forms for Higher Speeds,” International 
Shipbuilding Progress, Volume 6, 1959 
[2] Mandel, P., “The Potential of Semi-Submerged Ships in Rough Water Operation,” New 
England Section Paper, Soc. Nav. Architects Marine Engrs., Mar. 1960 
[3] Lewis, E.V., and Odenbrett, C., “Preliminary Evaluation of a Semi-Submerged Ship for 
High-Speed Operation in Rough Seas,” Davidson Laboratory Report No. 736, Mar. 1959 
[4] Lewis, E.V., “Possibilities for Reducing Ship Motions at Sea,” J. Amer.:Soc. Naval 
Engrs., Nov. 1958 
[5] Lewis, E.V., “Ship Speeds in Irregular Seas,” Trans. Soc. Nav. Architects Marine Engrs., 
1955 
[6] St. Denis, M., and Pierson, W.J., “On the Motions of Ships in Confused Seas,” Trans. 
Soc. Nav. Architects Marine Engrs., 1953 
[7] Mandel, P., “Subcritical and Supercritical Operation of Ships in Waves and the Coinci- 
dence of Maximum Damping,” J. Ship Research, June 1950 
[8] Numata, E., and Lewis, E. V., “An Experimental Study of the Effect of Extreme Varia- 
tions in Proportions and Form on Ship Model Behavior in Waves,” ETT Report 643, Dec. 
1957 
[9] Wigley, W.C.S., “Ship Wave Resistance, A Comparison of Mathematical Theory with Ex- 
perimental Results,” Trans. INA, 1926 
[10] Lewis, E.V., and Garland, C., “A Preliminary Parametric Study of High-Speed Schnorkel 
Submarines,” Davidson Laboratory Note 582 
[11] Breslin, J.P., and Velleur, J.W., “The Hydrodynamic Characteristics of Several Surface 
Piercing Struts, Part I, Analysis of Drag at Zero Yaw,” ETT Report 596, Jan. 1956 
[12] Wigley, W.C.S., “Water Forces on Submerged Bodies in Motion,” Trans. INA, 1953 
DISCUSSION 
H. N. Abramson (Southwest Research Institute, San Antonio) 
The subject of this Symposium is, of course, devoted to problems of hydrodynamics of 
high performance ships. Thus far during the Symposium, however, I have heard a great num- 
ber of discussions concerning economics and propulsion and even some structural topics, as 
well, and therefore I hope the organizers of the Symposium will not chastise me too greatly 
if I too digress, if only briefly. I hope that the authors will also forgive me if I give you a 
little story that is incidental, more or less, to the subject of the paper, but which, never- 
theless, has some bearing. One final remark by way of introduction: The paper by Professor 
Mandel was on the hydrodynamics of a deep-diving submarine, which design was carried 
