The first greyships were found by Hartmut Holzwart and Jason Summers in early July 2005. These ships traveled orthogonally at c/2. Since then greyships have been found for speeds c/3, c/4, c/5, and 2c/5.
Types of greyships
Most known greyship components use the stripes agar and travel with-the-grain (parallel to the stripes); There are some known against-the-grain greyships, in which the stripes are perpendicular to the direction of travel; however, these are only known for a speed of c/2.
Other than the stripes agar, there are a few known greyships that use the chicken wire agar. A looser definition of greyship may also include ships with extensible, high-density agars of higher periods.
- Dave Greene (July 9, 2005). "c/2 and 2c/4 "greyships"". Game of Life News. Retrieved on January 10, 2011.
- Greyship at the Life Lexicon