The mount is easy and quick to install or remove before or after use. I remove the mount (with the unit fastened) when trailering or not fishing for security purposes. On the water, the mount holds the unit very rigidly, i.e., it does not shake or shift when on-plane or in rough waters because of the rubber ball.
https://www.amazon.com/Ball-Mount-Humminbird-Helix-Only/dp/B014KVEVRC

