Section 72(1) in The Indian Port Health Rules, 1955
(1)If death occurs during the day on board a ship within port limits, the ensign and house flag, if any, shall immediately be lowered to half-mast and keep in that position from sunrise till sunset as long as the dead body remains on board; and if death occurs between sunset and sunrise, one red light shall be hoisted at the peak, half-mast high.
