The Judoon rockets were spacecraft used by the Judoon to travel and capture alien criminals. The appeared in groups of three. They had four landing prongs and four boosters, and would land vertically.
In 2008, the Plasmavore known as Florence Finnegan plotted to kill every living creature on the Moon at the time of Judoon's landing there and escape in the rockets, but this plan was foiled by the Doctor with the help of Martha Jones. (DW: Smith and Jones)