Figure 4 — Straight Tower (Located at East End of the Basin) 7 



Figure 5 - Control Platform 10 



Figure 6 — Tow Cable Catenary with Zero Buoyancy Rankine Ovoid 13 



Figure 7 — Centerline Wave Profiles of a Rankine Ovoid as a Function 



of Length of Run 13 



Figure 8 - Tow Cable and Model Location 14 



Figure 9 — Location of the Wave-Measuring Probes with Respect to the 



Line of Tow 14 



Figure 10 - Wave Heights of a Rankine Ovoid Towed at 10 Feet per 



Second 15 



Figure 11 - Wave Heights of a Rankine Ovoid Towed at 9 Feet per 



Second 16 



Figure 12 - Wave Heights of a Rankine Ovoid Towed at 7.3 Feet per 



Second 17 



Figure 13 - Wave Heights of a Rankine Ovoid Towed at 6 Feet per 



Second 18 



Figure 14 — Wave Heights of a Rankine Ovoid Towed at 5.5 Feet per 



Second 19 



Figure 15 - Wave Heights of a Rankine Ovoid Towed at 5.0 Feet per 



Second 19 



Figure 16 — Centerline Wave Heights of a Rankine Ovoid Towed at 



3.4, 4.0, and 4.6 Feet per Second 20 



Figure 17 — Centerline Wave Heights as Functions of Ovoid Velocity 21 



Figure 18 — Maximum Off-Centerline Wave Heights as Functions of 



Ovoid Velocity 21 



Figure 19 - Growth of the Centerline Wave Profile for Different Lengths 



of Run Compared with Stationary-Phase Expression 23 



Figure 20 — Centerline Wave Profile Obtained in a Moving Coordinate 



System Compared with Stationary-Phase Expression 25 



Figure 21 — Dimensionless Wave Heights of First Centerline Wave Crests 

 as Functions of Depth Froude Number — Experimental and 

 Stationary-Phase Data 25 



Figure 22 — Froude Scaling of Centerline Wave Heights of the 4.5- 



and 9-Foot Rankine Ovoids 26 



in 



