Many of the details documented from Bispevika 21 vary from the other wrecks found during the excavations at Barcode B11-B12 and B3-B7, in addition to the five wrecks found at B8a. While the wreck is constructed in the Nordic clinker boat tradition with overlaying strakes, all the nails fastening the strakes in Bispevika 21 are made from wood and not iron. The wreck has nine strakes preserved on the port side and eight on the starboard side. There is also 10 rows of frames, a keel, a stem and a stern posts and some ceiling planks. The boat parts are mostly made of oak, while only a few are made of conifer. Bispevika 21 has a carefully shaped transom. There is also an additional piece by the stem post, probably used as reinforcement. Such support could be beneficial if the boat was towed. Forwards from the center of the boat, there is a small squared mast hole. Inside the wreck there was a nicely preserved fish trap that might belong to the boat.