The Iron Guppy is a tugboat, built in 2016, and owned and operated by Ports Toronto.[1][2] She replaced the William Rest, a tugboat that served in Ports Toronto, and its predecessor agencies, since 1961. The Iron Guppy has very similar operational characteristics as the William Rest, however, with modern electronics.[3]
The Iron Guppy is a single screw tug, capable of breaking ice up to 6 inches (15 cm) thick.[1][2][4]
Ports Toronto called upon elementary school students to help pick the vessel's name.[5]
The vessel was designed by Robert Allan Limited, ship architects, and built by Hike Metals of Wheatley, Ontario.
Fireboat William Lyon MacKenzie gave the Iron Guppy a ceremonial shower, to mark her commissioning, on July 23, 2016.[6]