High Performance Ships—Promises and Problems 9 
The Baker boat,* High Pockets,” exemplifies the use of surface-piercing foils (see Fig. 7). 
This craft has the feature of essentially equal distribution weight on the forward and the 
after foil systems. The Carl XCH-4 (see Fig. 8) embodies ladder foils, an “airplane” dis- 
tribution of foil area fore and aft, and air screw propulsion. The Miami Shipbuilding Company’ s 
“Halobates” (Fig. 9), utilizes submerged foils in an “airplane” distribution and a right angle 
drive over the stern. Control in the version shown was achieved by the “Hook” system which 
Fig. 8. A test hydrofoil craft, the Carl XCH-4 
Fig. 9. A test hydrofoil craft, the Miami Shipbuilding Company’s “Halobates” 
