अश्वत्थामा बलिर्व्यासो हनुमांश्च विभीषण:। The group needs to investigate the island, but none can swim or soar so far (it had been widespread for such supernatural powers to get typical among figures in these epics). However, Jambavan is aware from prior activities that Hanuman used in order to do this https://hindutempleinadelaide.blogspot.com/2025/07/hanuman-ji-mandir-adelaide-embrace.html