Umm Haram reported the Prophet ﷺ as saying “He who becomes sick on a stormy sea and vomits will have the reward of a martyr. And he who is drowned will have a reward of two martyrs. (Using translation from Abū Dāʾūd 2493)
النَّبِيِّ ﷺ أَنَّهُ قَالَ الْمَائِدُ فِي الْبَحْرِ الَّذِي يُصِيبُهُ الْقَيْءُ لَهُ أَجْرُ شَهِيدٍ وَالْغَرِقُ لَهُ أَجْرُ شَهِيدَيْنِ