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In recent years the interest in adopting novel wireless Maritime data transmission technologies has peaNed, given the difficulties concerning the wired communication inside a ship’s structural complexity, alongside the difficulty in its installation process and its cost. A simulation of the feasibility of wireless data transmission in ships with LoRa, a narrow bandwidth long-range technology, in the domain of Internet of Marine Things (IoMT) using NS3, is being presented in this article. To simulate the interior and exterior environment of a ship, a new steel material was implemented in NS3 and was used as the material for the hull and the rooms of the vessel. Various nodes were then put in random positions inside the ship, and 3 scenarios were simulated; the first scenario had the Gateway installed at the bridge of the ship, the second scenario had the Gateway installed at the Cargo Control Room (CCR), and the third …