crewless

adj.

没有船员的；

Crewless glider
Crewless glider
Crewless in space
Crewless Craft on Steady Course
Crewless Ghost Ships of the Interwar Navy
System of crewless small-tonnage ships' group control
Underwriters get ready for crewless ships
0203 Maneuvering performance of a crewless GPS solar boat
111 Autonomous navigation systems for a crewless GPS solar boat
Low-altitude images application from Crewless Air Vehicles for quick geoinformation updating