What is the ruling on praying the remaining prayers (Dhuhr, Asr, Maghrib) on a ship, at a distance of thirty to thirty-six kilometers from land, while performing the Fajr and Isha prayers in the mosque?

Prayer must be performed on time inside the ship, and there is no harm in not performing it in the mosque. Since the mentioned distance is not a distance that permits shortening prayers, it is not permissible to shorten the four-rak'ah prayers nor to combine prayers that share a time.