The Perseus arrives at the treasure island. A recon squad consisting of Senku, Soyuz, Kohaku, and Gen set off to locate the platinum and make contact with the islanders. Ukyo later discovers something on the seafloor and send Ginro to investigate.
It hasn't been half an hour since they left.
.لم تمض نصف ساعة على مغادرته
Die liegen hier noch
keine halbe Stunde.
No hace ni media hora que se marchó.
No hace ni media hora que se ha ido.
Elle est partie
il y a moins de 30 minutes.
Non è passata neanche mezz'ora 
da quando se n'è andata.
Não faz meia hora desde que partiram.
Он ушёл менее получаса назад.