Replicators: B2/S13

B2/S13 and related rules have a simple replicator that acts with period three on a one-dimensional 3-unit grid:

B2/S13 3c/3 replicator

Jason Summers discovered 3c/3 spaceship based on this replicator:

and a similar one in the related rule B25/S13:

Replicators -- Cellular Automata -- D. Eppstein -- UCI Inf. & Comp. Sci.