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A boat stabilizer is a device that controls a boat’s motion. A flap stabilizer controls a boat’s heel and is popular with small family boats. A fin stabilizer controls a boat’s roll when underway or at anchor zero speed and is popular with mid-size boats to mega yachts. A gyro stabilizer controls a boat’s roll effectively when underway or at anchor, including at slow speeds and is popular with yachts, sport boats, and commercial boats.

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The ARG is effective only with mono-hull (single hull) vessels under 150 ton full load displacement weight. The gyro stabilizer initially became popular with fishermen and commercial markets for work boats. It spread to the recreational boat market soon after when Ferretti Group Italy began to offer the ARG as a “strongly recommended option”.

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The ARG is used in any situation where guests are uncomfortable with the roll motion while at sea, except during extreme weather conditions when either the port patrol or weather forecasts give warnings, for example, extreme storms or hurricane weather.

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There is no limit; the ARG can be used as long as you want while underway or at anchor.

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This is an area where the Tohmei / Mitsubishi ARG excels over the competition. There is no scheduled maintenance required. We do recommend, however, that once a year the system is visually checked for any irregularities.

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Our ARG provides even and steady results which keep the generator functioning seamlessly without fins protruding from the sides of the hull. Everything (the gyro and the driver) is contained inside the vessel which makes docking and maneuvering easier. It is possible to even run the ARG at the dock while plugged into shore power. Other hydraulic systems operate at ‘zero speed’ with extra-large fins protruding from the sides of the hull. A large hydraulic pump moves the fins to create the desired effect. The pump speeds up and slows down upon demand creating a random load variance which results in the need to install a larger generator. Our ARG replaces the need for extra components such as fins on the sides of the hull or the replacement of generators.

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The ARG has a safety device to stop the ARG automatically. When the ARG is operated under the following conditions, the safety device operates and the ARG stops:

1. Ambient temperature of the ARG becomes high.

2. The ARG generates excessive load by the operation under stormy weather or excessive high wave condition.

3. One of the dampers breaks down.

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The ARG has a function called “automatic fast return functions”. It is a function that allows for the ARG to not be turned off even if the source is turned off for a moment.

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The passive control omits the need for electronic control components which in turn provides a higher level of safety. The passive control system also requires no maintenance (other than the yearly inspection).

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When installing an ARG, it is important to keep clearance on both sides of the gyro to allow for adequate air flow. It is also important to be able to have access to the ARG for inspection purposes.

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Because the ARG is nearly maintenance free it can be located just about anywhere on the boat. The following are recommendations to consider when installing the ARG:

1. Consideration of the ships center of gravity and balance.

2. Ventilation is required if locating in a confined space.

3. Locate the ARG in a soundproof area like an engine room.

4. Make sure the area selected is strong enough to transfer the generated torque to the vessel. The boat’s primary structural beams are a good choice.

5. The ARG does not have to be mounted on the centerline to be effective. The ARG is equally as effective if sitting across from a generator.

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1. Sizing depends on the objective of the boat owner.

2. There are three different models of gyros: ARG 175T, ARG 250T, ARG 375T.

3. Each model will provide excellent roll reduction for a boat depending on the vessels displacement. Every vessel has it is own characteristics. For more details fill out the VESSEL INFORMATION section under Contact Us.

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Yes. Depending on the type of vessel, it may be necessary for you to use multiple ARGs.

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Specifications for Gyro ARG 175T, Gyro ARG 250T, and Gyro ARG 375T.

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No. The ARG is designed to cool itself by using the flywheel’s rotation at high speed to create an air current through the unit.

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The life span will depend on the bearing life. We anticipate that the bearing life is around 4,000 to 6,000. This however highly depends on the sea conditions when the ARG is in use.

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We recommend an atmosphere temperature around 40C / 104F degrees. However, if the installation place is hotter than the recommended temperature, it is necessary to include additional ventilation systems to reduce the temperature as much as possible.

Humidity is not a major issue but do take into consideration that the ARG is not waterproof. Therefore, the installation lace should be water tight. Some parts of the ARG may rust if the atmosphere is humid but this will not affect the performance and the life

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We have three models that will be installed depending on the boat size and weight. The difference among the three models is the “anti-rolling torque”. The ARG 250T generates about 43% more anti-rolling torque than the ARG 175T. The ARG 375T is 50% more powerful than the ARG 250T. Please refer to specifications for Boat Stabilizer ARG 175T, Boat Stabilizer ARG 250T, and Boat Stabilizer ARG 375T.

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24 months after delivery to first-use purchaser of the boats, but not exceeding 36 months after the date of the Bill of Lading. (Commercial and military use, Japanese market is different from above).

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Any competent boat yard may install an ARG. However, the structural foundation should be approved by a Marine Engineer to ensure that it will safely transfer the torque to the vessels hull. Please Contact Us for more details.

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Compared with other gyro stabilizers our ARG is constructed with a simple and durable design that requires no daily maintenance. Our ARG is nearly maintenance free, it only requires maintenance when the bearing life expires. Our ARG has no complicated wiring, software control, hydraulic, and water cooling. Please Contact Us for more information.