SHIP

A ship comprising: a hull; a fuel ammonia tank which is provided in the hull and which stores fuel ammonia; a fuel supply line which is connected to the fuel ammonia tank; a combustion device into which the fuel ammonia is introduced from the fuel ammonia tank through the fuel supply line; an inert gas supply device which pumps inert gas into at least the combustion device through the fuel supply line; an ammonia recovery tank into which ammonia remaining in the combustion device is introduced together with the inert gas that has been pumped into the combustion device; a denitration device into which exhaust gas that is generated by combustion in the combustion device is introduced; and an ammonia introduction line which connects the ammonia recovery tank and the denitration device and which introduces, as a reduction agent, the fuel ammonia in the ammonia recovery tank into the denitration device.