The Norlin Mk I is a narrow boat just like the Södergren Mk II and III from the same era.
Compared to a Norlin Mk III she is a tad longer and lighter though most of the difference in
displacement comes from the smaller keel on the Norlin Mk I.
Looking at the lines she is not of the same family as the Mk II and III. especially the aft part
of the underwater body is completely different with much less volume.
