For 10 points, identify these objects exemplified by the Argo, on which Jason sailed.
In Egyptian mythology, one of these objects took the forms of the Mandjet and the Mesektet. In Norse mythology, the giantess Hyrrokkin arrived to push one of these objects, on which Nanna committed suicide. The Gylfaginning advises its readers to clip the toe- and fingernails of the dead to prevent the completion of the largest of these objects, which is named Naglfar, and also mentions the best of them, Frey's Skidbladnir. Similarly to the way a dove lost parts of its tail feathers, one of these objects was partially damaged as it passed through the Clashing Rocks on its way to Colchis and the Golden Fleece. For 10 points, identify these objects exemplified by the Argo, on which Jason sailed.
In Egyptian mythology, one of these objects took the forms of the Mandjet and the Mesektet.
ships [or boats; or solar barges; or solar barques]