Ice consitancy varies among all lakes, we were fishing a lake that had 22 inches of ice where we were fishing all day. When we were leaving the lake and heading to the landing we lost four trucks and i almost lost my father, the god of who taught me fishing. Very important to check ice thicknees every 100 yds or even more when in doubt. If in doubht stay off. We all made it back to shore and are still fishing. Very lucky and trucks can be replaced but a life can`t be. Be careful and fish on.