The Mark 44 torpedo, is an acoustic torpedo, designed to home in on the sounds that a submarine makes. The Mark 44 could be used off of a ship or dropped from an aircraft, such as the Tracker or SeaKing.
A list of past and present users of the Mark 44.
Australia, Brazil, Canada, Chile, Colombia, Germany, Greece, Indonesia, Iran, Italy, Japan, South Korea, Netherlands, New Zealand, Norway, Pakistan, the Philippines, Portugal, South Africa, Spain, Thailand, Tunisia, Turkey, United States, Uruguay, and Venezuela.
The Museum’s torpedo is a practice loading round with no fuel or guidance unit in it.