The Ghost: A Revolutionary Stealth Boat that “Flies” Underwater

Christian Baghai
3 min readAug 13, 2023

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In the world of naval warfare, innovation is a constant pursuit. The need to protect, defend, and outmaneuver potential threats drives the development of new technologies and strategies. One such innovation that captured the imagination of many is the Ghost, a stealth boat designed to “fly” underwater. But despite its revolutionary design and potential, the Ghost’s journey has been fraught with challenges, controversy, and ultimately, an unfulfilled promise.

The Birth of the Ghost

The Ghost’s inception was rooted in a tragic event. The attack on the USS Cole in 2000, where a small boat loaded with explosives caused significant damage and loss of life, led to the realization that the U.S. Navy needed a solution to counter such threats. Greg Sancoff, the boat’s inventor, was inspired to create a vessel that could neutralize small, high-speed boats, a threat that was further emphasized by a U.S. Navy war game report estimating significant casualties in a simulated attack.

A Design Like No Other

The Ghost’s design is nothing short of extraordinary. Its stealth capabilities, low radar cross-section, and ability to be equipped with various weapons make it a formidable asset for fleet defense. But what truly sets the Ghost apart is its unique construction.

The Ghost is essentially a boat attached to two giant submarines, utilizing a design called SWATH (Small Water Plane Area Twin Hull). This design allows the Ghost to ride on two fins attached to two submerged pontoons, making it incredibly stable even in high seas. The vessel’s propellers are placed in the front, pulling the boat forward and creating underwater gas tunnels around the pontoons, reducing hull friction by 900 times. This allows the Ghost to reach a top speed of 40 knots, making it the fastest SWATH ship on the planet.

A Journey Marred by Controversy

Despite its innovative design, the Ghost’s journey has been anything but smooth. Critics pointed out limitations such as its range and logistical challenges, while others raised concerns about the front placement of the propellers, which could lead to vulnerabilities.

The U.S. Navy’s initial interest in the Ghost waned for various reasons, including a preference for larger, more versatile ships and apprehensions about working with new technologies. The relationship between the U.S. government and Juliet Marine Systems, the company behind the Ghost, became strained, leading to secrecy orders and legal battles.

A Missed Opportunity?

The Ghost’s story is a complex tapestry of innovation, ambition, bureaucracy, and missed opportunities. Its potential as a fleet defense vessel, anti-submarine warfare tool, and assault vehicle is undeniable. Yet, the challenges it faced, both in design and in its dealings with the U.S. government, led to its downfall.

Currently displayed in Portsmouth, New Hampshire, the Ghost stands as a symbol of what could have been. Its revolutionary design and the vision behind it offer valuable lessons for future naval innovations.

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Christian Baghai
Christian Baghai

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