Of course, being attached to the house doesn't allow for much steering, so the man drifts along until he decides to set himself down in a mountain crevice.

When you are steering, what should be especially careful about?

And quiet sleep and a sweet dream when the long trick's over.

Contraposing the feature and the special demand of autocontrol section in automatic rudder experiment sys-tem, this paper illustrates its general method of designing and process of implementation.

Later on the base of development of electronics and its application, PID steer appeared which integrated control technology and electronic parts.