The interested reader may enjoy the following articles which describe some of the concepts behind SPAN and velocity prediction programs in general.

Gerritsma, J., Keuning, J.A. and Onnink, R. “The Delft Systematic Series II experiments”, International Ship Building Progress, vol 28, no 328. 1981.

Gerritsma, J., Onnink, R. and Versluis, A. “Geometry, resistance and stability of the Delft Systematic Yacht Hull Series”, 10th Chesapeake Sailing Yacht Symposium, Annapolis. 1991.

Hazen, G.S. “A model of sail aerodynamics for diverse rig types”, New England Sailing Yacht Symposium. 1980.

Kerwin, J.E. “A velocity Prediction Program for Ocean Racing Yachts”, SNAME New England Sailing Yacht Symposium. Connecticut U.S.A. 1976.

Kerwin, J.E. “A velocity Prediction Program for Ocean Racing Yachts, revised to June 1978”, Massachusetts Institute of Technology report no. 78-11. 1978.

Keuning, J.A., Sonnenberg, U.B.  “Developments in the Velocity Prediction Based on the DELFT Systematic Yacht Hull Series”, RINA Modern Yacht Conference, Portsmouth. 1998.

Pedric, D. “(A)IMS – an Almost Ideal Measurement System” Yacht Vision ’94, Auckland, New Zealand. 1994.

Philpot, A.B. , “Developments in VPP Capabilities” Yacht Vision ’94, Auckland, New Zealand. 1994.

Poor, C.L. “VPP Algorithm description” Appendix to Description of IMS VPP and LPP Algorithms. IMS. 1986.