Nul-Kryds is a student union representing engineering students with an interest in the maritime field at the Technical University of Denmark.

The association is independent and consists of volunteers who organize both academic and social events with the purpose of strengthening the link between students and the industry, as well as helping students in everyday life.

The majorty of marine engineering students at the Technical University of Denmark have been in contact with Nul-Kryds at some point during their studies. The association was founded in 1947 on the occasion of the first NTHS Congress. Nul-Kryds has participated in every NTHS congresses since.