Rockin' Tug is a flat tugboat ride manufactured by Zamperla. The ride is manufactured in both traveling and park versions. It is the first of a line of new "halfpiperides". Zamperla's Disk'O is another popular ride from that "family". The difference is that the Rockin' Tug has a friction wheel, while the Disk'O is powered driven. The idea itself is not new. Schwarzkopf made a ride called Shuttle Boat in 1978, in both portable and park versions.