The ghost that suddenly appeared on the ship is Masaki's astral body.
After Jovia creates her body, Masaki leaves to check on her tree's grafting.
With the island's formation ongoing, 
Seina suggests that Tsukiko spends time in Kamidake's magic unit...
there's nothing to avoid 
in the open ocean.
لا شيء يحتاج للتّفادي في المحيط المفتوح
in pieno oceano non ci sono punti di riferimento.
Não tem nada para comparar
com um mar aberto.