Here is a UGV capable of traveling on land and in water for outdoor research. The Warthog UGV can negotiate rough terrain with its rugged built and traction tires. It comes with payload mounting plates, so you can add sensors and manipulators for your projects.
Warthog is ROS ready. It is capable of moving 272kg of payload and reaching speeds up to 18 km/hr on land. This UGV is fully amphibious, with a max water speed of 4 km/hr.