A flotilla is a collection of two or more mobile objects, such as spaceships, puffers, trailers, and tagalongs, that travel together. In Live Free or Die, complex flotillas using c spaceships and puffers are possible. Some, like anchor eater ships, anchor nibbler puffers, and freedom fighter ships, can have arbitrarily high period. Others (anchor track flotillas) use anchor tracks to produce various objects, such as monsters, radar, and free ships, none of which can be produced by a puffer or rake acting alone. For examples of flotillas, download the Live Free or Die collection.