The Sawfish harvester is a submersible

robot A robot is a machine—especially one programmable by a computer—capable of carrying out a complex series of actions automatically. A robot can be guided by an external control device, or the control may be embedded within. Robots may ...

produced by the Triton Logging Inc. It is designed for cutting down submerged trees and popping them to the surface, with large pincers and a

chainsaw A chainsaw (or chain saw) is a portable gasoline-, electric-, or battery-powered saw that cuts with a set of teeth attached to a rotating chain driven along a guide bar. It is used in activities such as tree felling, limbing, bucking, pru ...

. Such trees are generally submerged when

dam A dam is a barrier that stops or restricts the flow of surface water or underground streams. Reservoirs created by dams not only suppress floods but also provide water for activities such as irrigation, human consumption, industrial use ...

s are built near existing forests, and their wood remains good while underwater for long periods.

External links

News report
on the Sawfish
Triton Engineering page: details on the Sawfish
Underwater robots 2000s robots Robots of Canada {{product-stub