Canadarm3 is a weaponised Heavy Bomber used by Canada during the battle against the invading Nazi forces. It's name is based on the Canadarm, a Canadian-developed robotic arm used on NASA's Orbiter spacecraft.
It's main weapon is a Revolver cannon and missiles which were seen firing at Nazi forces over the moon
It is unknown if the Canadarm Survived the Battle over the moon
Also of note are the eponymous Canadarms, which can be seen on the long structures protruding from the main body.
As the Fleet emerged suddenly to the surprise of the U.S president the Canadarm was among them and was incharged by a female captain with a normal tone
Qoutes: "Hang in there W, Canadarm Joining the battle"
- introduced only as "Canadarm", the "Canadarm3" as seen on the side of the hull references the historical Canadarm of the orbital spaceshuttles' cargo bay, and Canadarm2 of the ISS made by MDA of Vancouver BC.