This is the Mitgardian longship "Ormr hinn víðfǫrli" (The Far-Travelling Serpent). It is owned by Sigólfr Brímabani (at the steering oar) of the Wyrm Clan. Because of the current unrest, they built this ship to be able to defend Mitgardia from attackers.
Sigólfs best warriors are at the oars. Their names are Gunnarr, Óláfr, Friðþjófr, Þórólfr, Egill, Þórsteinn, Úlfr, Stýrbjǫrn, Snorri, Starkaðr, Kári, Bjólfr, Ragnarr and Ívarr.
In the bow they store water, beer, fermented herring, crisp bread, fermented and soured milk, dried meat and other delicious food that you need when you go viking. They also keep the spears in the bow, but midships they have swords and axes.
In the stern is an idol of a god of water and journeys at sea.
(Technically this is no longship, since its width/length ratio is ca. 1:4.5, which makes it a Karfi (which wasn't a ship of war). But I didn't have more of the prefab hull pieces so I couldn't make it any longer. A real longship should be at least 1:6 and have some 30+ oarsmen.)