Wisconsin Statutes Public Lands, Waters and Natural Resources (Ch. 23 to 33) § 30.675. Distress signal flag

(1) Insofar as is possible without serious danger to the operator's boat or persons on board, the operator of a boat observing a distress signal shall render to the boat or person displaying the signal such assistance as may be practicable and necessary to save the boat or person or to minimize any danger to them.

(2) No person shall display a flag like that described in sub. (1) unless such person is in need of assistance to prevent bodily injury or destruction of property.