Again, just like jaH, it depends. Duj vIpaw means "I arrive at the ship;" DujDaq jIpaw means "I arrive on the ship," that is, I arrive via the ship or something like that. And it would probably be okay to say DujDaq vIpaw for "I arrive at the ship." But Duj jIpaw strikes me as odd. (HolQeD, vol. 7 issue 4, December 1998)Note that this rule contradicts the usage on Power Klingon.