Summary and Key Points: The Greater Underwater Propulsion Power Program (GUPPY) was launched by the U.S. Navy after World War II to enhance submarine speed, maneuverability, and endurance.

Say hello to the Navy’s GUPPY submarine program of the early Cold War. (NOTE: There’s also a “mechanical flying fish,” i.e., an airplane, bearing the name “Super Guppy,” but that’s a ...

Built in 1943, the Becuna is a Balao-class submarine with a Greater Underwater Propulsive Power 1-A modernization — today, it's the only remaining GUPPY 1-A submarine in the world. After serving ...

A properly dressed male guppy, with its gaudy blue spots and brilliant splashes of orange, can't help but stand out. But for a fish that spends its life swimming among predators, it seems that ...

The sub underwent a Greater Underwater Propulsive Power 1-A modernization in 1951. Now a museum exhibit in Philadelphia, it is the only GUPPY 1-A submarine left in the world. Built in 1943 ...

The USS Becuna submarine sank 3,888 tons of shipping and earned four battle stars in World War II. Becuna underwent a Greater Underwater Propulsive Power (GUPPY) 1-A modernization in 1951. Now a ...

The sub underwent a Greater Underwater Propulsive Power 1-A modernization in 1951. Now a museum exhibit in Philadelphia, it is the only GUPPY 1-A submarine left in the world. Built in 1943, the Becuna ...

The USS Becuna submarine sank 3,888 tons of shipping and earned four battle stars in World War II. Becuna underwent a Greater Underwater Propulsive Power (GUPPY) 1-A modernization in 1951. Now a ...