the handle or wheel which controls the direction in which a ship or boat travels舵柄;舵轮
Who was at the helm when the collision occurred?发生碰撞时谁在掌舵?
at the helm officially controlling an organization or company负责,掌管
With Steve Lewis at the helm, we are certain of success.由史蒂夫‧刘易斯负责,我们肯定会成功。
take the helm to start to officially control an organization or company开始负责,开始掌管