Unclassified 
Security Classification 
KEY WOROS 
Seafloor excavation 
Power transmission systems 
Electrical 
Hydraulic 
Pneumatic 
Mechanical 
Power transfer 
Power conversion 
Equipment mobility 
Seafloor trafficability 
Buoyancy systems 
Spoil removal 
Remote control of equipment 
Casing methods 
Rock penetration 
Rock fragmentation 
Sealing and dewatering excavations 
DD Fort 1473 ( BACK ) ; Unclassified 
(PAGE 2) Security Classification 
