1. Marine Tech. Div., Naval Tech. Div., Naval Research Lab., Washington, D.C.
2. Ocean Structures Div., Civ. Engrg. Lab., Naval Construction Battalion Center, Port Hueneme, Calif.
3. Marine Tech. Div., Naval Research Lab., Washington, D.C.
4. Ship Performance Dept., David Taylor Naval Ship R & D Center, Bethesda, Md.