To steer wildly; move from the right course.

乱驶；(船或飞机)偏航。

To oscillate about a longitudinal axis in the horizontal plane, as a rocket or projectile.

摇摆不定地直线下坠。

A changing from a straight course in steering a ship or of guiding an airplane.

(船或飞机)变更航线；偏航。