1999 Eastern Swath

Amelia, LA, US

Eastern Swath 120ft

US $550,001

Amelia, LA, US


Built at the Eastern Shipbuilding Group in Panama City, Florida.

The 2 main engines are Allison 501KF Turbines (10,600HP, 30 knots)...

Bow thruster...Ride Control, MDI-Active Fin, Stabilizers Inmarsat-C Mobile Earth Station-MES.

A Small Waterplane Area Twin Hull, better known by the acronym SWATH, is a twin-hull ship design that minimizes hull cross section area at the sea's surface. Minimizing the ship's volume near the surface area of the sea, where wave energy is located, maximizes a vessel's stability (lowers sea sickness), even in high seas and at high speeds. The bulk of the displacement necessary to keep the ship afloat is located beneath the waves, where it is less affected by wave action. Wave excitation drops exponentially as depth increases, so wave action normally does not affect a submerged submarine at all. Placing the majority of a ship's displacement under the waves is similar in concept to creating a ship that rides atop twin submarines.


We are open to any cash offers and we are willing to consider seller financing, bareboat charter, or joint venture options.


MV Deacon only worked five years after being built before being stacked. MV Deacon cost over $22m to build and would cost $30m to duplicate today. MV Deacon is US Flag and was USCG certified, and ABS classed when it was in service.

This 120’ x 40’ Aluminum SWATH crew boat was built in 1999 for Trico Marine to quickly shuttle as many as 250 passengers to offshore platforms.

She was built by Eastern Shipbuilding Group and designed by Petrobras.

The goal was to create an offshore crew transport vessel that would phase out costly helicopter rides and rough voyages on conventional, mono-hull crew boats.

The SWATH design provided a smooth ride and met the requirements of an average speed of 25 knots.

The M/V Deacon is capable of speeds over 30 knots.

The ergonomic requirements were defined to limit the incidence of seasickness to less than 5% in 4 hours exposure in the 2- to 3- meter seas so common to the Campos Basin where the vessel would operate. They also required comfortable seating, ample legroom and an HVAC system with a relatively high rate of exchange. The final design presented a number of challenges, while incorporating many high-tech features, such as a gas turbine coupled to controlled pitch propellers via a 27:1 reduction gear and an active fin system.

The vessel was built for $23 million. New construction cost to replace the vessel is estimated at over $30 million. While the M/V Deacon is currently powered with two Allison 501 KF turbines, she may be re-powered with conventional engines. A recently constructed model shows what the vessel’s outer decks would look like with conventional power.

After five years of service in Brazil, the vessel was placed in freshwater storage for five years. During the five years of storage, the crew was on board and machinery was run regularly. The M/V Deacon was transferred to Seacraft Shipyard where she was dry-docked in June 2008 and the bottom of the vessel was repainted. Seacraft is in Amelia, Louisiana, USA.


**Unmatched Stability and Power: 1999 Eastern Ship Building Swath 120 with Allison 501KF Turbines** ENGINES OUT OF BOAT**

Discover a vessel that redefines stability and power - the 1999 Eastern Ship Building Swath 120. Meticulously crafted with cutting-edge design, this SWATH (Small Waterplane Area Twin Hull) catamaran is equipped with twin Allison 501KF turbines, offering an unparalleled combination of efficiency, reliability, and sheer exhilaration on the water.

**Key Features:**

1. **SWATH Design Excellence:** The Small Waterplane Area Twin Hull design ensures exceptional stability, even in challenging sea conditions. Experience a smooth and comfortable ride, allowing you to navigate with confidence and grace.

2. **Allison 501KF Turbines:** Powered by twin Allison 501KF turbines, this vessel delivers impressive speed and efficiency. The turbines provide a robust and reliable propulsion system, making every journey a thrilling and reliable experience.

3. **Spacious Deck Layout:** The Swath 120 offers an expansive deck space, providing versatility for various uses. Whether you're considering this vessel for private use, commercial applications, or expeditionary purposes, the deck layout can be tailored to your specific needs.

4. **Comfortable Accommodations to be refit to your requirements:** 


6. **Durable Construction:** Crafted by Eastern Ship Building, renowned for its commitment to quality and durability, this Swath 120 is a testament to maritime engineering excellence. The vessel is built to withstand the rigors of diverse marine environments.

**Additional Information:**

- **Year:** 1999
- **Make:** Eastern Ship Building
- **Model:** Swath 120
- **Turbines:** Twin Allison 501KF
- **Length:** 120 feet

For those seeking a vessel that combines cutting-edge design, unmatched stability, and the power of Allison 501KF turbines, the 1999 Eastern Ship Building Swath 120 stands as an extraordinary option. Whether for private ownership, commercial use, or specialized expeditions, this SWATH catamaran is ready to redefine your maritime experience. Contact us today for a private viewing and take the helm of this exceptional vessel that stands at the intersection of innovation and power.


  • Length: 120ft
  • Builder: Eastern Shipbuilding Group
  • Beam: 44' 0"
  • Draft: 13' 0"
  • Year: 1999
  • Hull: Aluminum
  • Speed: 30
  • Status: Active

View More Specs


  • Builder: Eastern Shipbuilding Group


  • Length Overall: 120 ft
  • Max Draft: 13' 0"
  • Beam Measure: 44' 0"


  • Total Power: 10600
  • Engine Brand: Allison
  • Year Built: 1999
  • Engine Model: 501KF Turbines
  • Engine/Fuel Type: Diesel
  • Engine Power: 5300 hp

  • Total Power: 10600
  • Engine Brand: Allison
  • Year Built: 1999
  • Engine Model: 501KF Turbines
  • Engine/Fuel Type: Diesel
  • Engine Power: 5300 hp


  • Fresh Water Tanks: 1 (17483 Gallons)
  • Fuel Tanks: 1 (17483 Gallons)


  • Number of cabins: 3
  • Number of heads: 2


Engine hours are as of the date of the original listing and are a representation of what the listing broker is told by the owner and/or actual reading of the engine hour meters.  The broker cannot guarantee the true hours.  It is the responsibility of the purchaser and/or his agent to verify engine hours, warranties implied or otherwise and major overhauls as well as all other representations noted on the listing brochure.


The Company offers the details of this vessel in good faith but cannot guarantee or warrant the accuracy of this information nor warrant the condition of the vessel. A buyer should instruct his agents, or his surveyors, to investigate such details as the buyer desires validated. This vessel is offered subject to prior sale, price change, or withdrawal without notice.


The Company offers the details of this vessel in good faith but cannot guarantee or warrant the accuracy of this information nor warrant the condition of the vessel. A buyer should instruct his agents, or his surveyors, to investigate such details as the buyer desires validated. This vessel is offered subject to prior sale, price change, or withdrawal without notice. Hours on motors and generators cannot be guaranteed and what is listed may change.

A minimum of $495.00 closing fee will be added to the final total price of the vessel. Please ask your selling agent for a complete closing statement as they can change with every sale. Coast Guard Documentation, State Registration, and other fees are not included in the price of the vessel.  

The Multihull Company is pleased to assist you in the purchase of this vessel but may be listed with another brokerage company.


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