On February 4, 2017, Matthias Merzenich discovered 339P7H1V0, a large p7 width-19 bilaterally-symmetric c/7 orthogonal spaceship. These ships can be chained by nontrivial spark interactions to produce an infinite number of distinct c/7 orthogonal spaceships.
- Michael Simkin (April 16, 2016). "Re: Caterloopillar WIP (all speeds < c/4)". Retrieved on April 16, 2016.
- Matthias Merzenich (July 26, 2019). "Re: Spaceship Discussion Thread". Retrieved on July 26, 2019.
- Shannon Omick (February 18, 2013). Re: c/7 orthogonal spaceships (discussion thread) at the ConwayLife.com forums