De'vID:

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So a way of forcing the meaning *on the ship* and *in the room* could be adding a pronoun or a noun?:

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*DujDaq 'oH ghoStaH* - It is approaching it on the ship. *pa'Daq vogh yIjaH* - Go somewhere in the room!   Yes. In these cases, there's an explicit (direct) object, so the noun with {-Daq} is something else.

Thank you for your answer! By the way: I just realised that *DujDaq 'oH ghoStaH* can also mean *It's going along it on / to the ship*, depending on the context.