Answer: The tremendous explosion changed the course of their journey together because they had a life-threatening situation. When the father got thrown to the sea, his family was struggling to survive on the ship as well. However, the family got closer and realized they would be fine, as long as they were together, despite being possibly near their end.
Explanation: The narrator's family goes into an adventure without knowing they would face a life-changing experience. As days passed by, the weather started to worsen, and an explosion occurred, the narrator was thrown to the sea and hurt. When he managed to come back, his family was battling to survive on the ship. However, even though everybody experienced pain and fear, they realized that they were not afraid to perish, as long as they were together.