law: The Inland Vessels Act, 2021
  49. Distress signal.-
  The master of a mechanically propelled vessel, while in the inland water limit, on finding or encountering a dangerous derelict or any other hazard to navigation in the inland waterways, shall immediately send a signal to indicate the danger or distress, or any such information to other mechanically propelled vessels in the vicinity and to the concerned State Government:
  Provided that no fees or charges shall be levied on any mechanically propelled vessel, in using any device for communicating any information under this section.