The tank is filled with a very dense gas (you see them filling it with a hose from a cylinder at the start). The title is German for “Ship floats on gas”. I think the gas is sulphur hexafluoride- it’s about 4 times as dense as air, enough for the boat to float on it, but only 0.6% as dense as water.
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The tank is filled with a very dense gas (you see them filling it with a hose from a cylinder at the start). The title is German for “Ship floats on gas”. I think the gas is sulphur hexafluoride- it’s about 4 times as dense as air, enough for the boat to float on it, but only 0.6% as dense as water.