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The hydraulic drive of our diving bell LARS ensures smooth and precise control during launching and recovery. This guarantees operational safety even in heavy seas, eliminating dangerous jerks and ensuring platform stability. The design combines high power with compact dimensions and exceptional reliability.
The 1T capacity model is a mobile LARS built on a U-frame with two winches, designed for the safe launching and recovery of a diving bell with two divers at a load of up to 1 ton. The design provides high mobility and autonomy: compact dimensions for transport and independent power from an onboard pump unit allow for rapid system deployment on any vessel.
Loading model
(highlighted in red)
The base is a welded steel structure serving as the mounting platform for all components of the launching and recovery system. It is secured to the deck at six points using standard marine container twist-locks, ensuring a reliable and stable attachment for the entire system.
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The frame is a movable load-bearing structure that manages the luffing of the diving bell overboard and back on deck. It is equipped with two winches: one for hoisting and another for the guide wire. Inductive limit switches monitor the frame’s extreme positions (“outboard” and “inboard”). In the stowed position, it is securely held by two turnbuckles, while a locking system secures the frame during both operation and standby.
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The hoisting winch manages the direct launching and recovery of the diving bell using a load-bearing wire rope. It is equipped with a hydraulic geared motor and a dual-circuit braking system for maximum safety: a gearbox brake (torque ≥ 2700 N·m) and a caliper brake on the drum (torque ≥ 1900 N·m).
(highlighted in red)
The guide wire winch performs two key functions: it guides and maintains the vertical position of the bell during launching/recovery and manages the movement of the ballast. In an emergency, should the primary hoisting winch fail, it serves as a redundant system to ensure the bell’s recovery.
The winch is equipped with a hydraulic geared motor and a dual-circuit brake to guarantee stopping and load holding: a gearbox brake (torque ≥ 1580 N·m) and a caliper brake on the drum (torque ≥ 1130 N·m).
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The hydraulic cylinders, installed between the base and the A-frame, enable the system’s transition between operational and stowed positions by luffing the frame overboard and back. Equipped with a braking system, the design guarantees an immediate stop and secure fixation at any point.
(highlighted in red)
The diving bell is a prefabricated metal structure designed to accommodate two specialists with full gear. Its launching and recovery are managed by the hoisting and guide wire winches.
To ensure underwater stability, the bell is equipped with ballast attached beneath it. In the stowed position, the ballast is secured to the structure for transport convenience, and when necessary, it functions as a redundant lifting element.
The following documentation provided with the LARS:
| Document | Quantity |
|---|---|
| Product Data Sheet | 1 |
| Installation, Commissioning, and Adjustment Manual | 1 |
| Operating Manual | 1 |
| Onboard Test Program and Methodology | 1 |
| Declaration of Materials (DM) | 1 |
| Supplier’s Declaration of Conformity (SDoC) | 1 |
Imagine this: the ship is rolling in the waves, the water overboard is cold and murky, and you need to send people down to a depth of 60 meters to work—perhaps to weld pipes or inspect a sunken object. Simply jumping overboard is out of the question—it’s too dangerous and inefficient. For this task, true engineering masterpieces exist: Launching and Recovery Systems (LARS). This is not just a winch with a cable, but a sophisticated complex that ensures diver safety in a hostile marine environment.
Working at Angles and in Storms
The primary mission of this device is to deliver divers to their working depth and bring them back. It sounds simple, but in reality, engineers had to solve numerous problems. First, the vessel is never stationary—it can have a heel of up to 5 degrees and a trim (bow or aft tilt) of up to 2 degrees. Second, sea conditions can reach state 4. The entire structure is designed to remain fully operational under these challenging conditions.
What Is It Made Of?
At the core of the entire system lies a massive welded base made of 09G2S steel (a specialized shipbuilding grade). It is secured to the vessel’s deck at six points using standard container “twist-locks,” allowing for rapid installation or dismantling. All other elements are mounted on this foundation, which weighs nearly three tons (with the total system exceeding 3,200 kg).
The heart of the moving part is the U-frame. It luffs overboard, carrying two divers in a specialized bell. The frame’s movement is powered by two robust hydraulic cylinders with a 125 mm piston diameter. To prevent the frame from jerking under load, specialized brake valves are installed on the cylinders—they prevent it from falling under its own weight.
Why Are There Two Wire Ropes?
Anyone who has used an elevator knows there is a cable and a counterweight. The principle here is similar but more complex. The system utilizes two wire ropes, each with its own role.
The first, a 11.5 mm diameter hoisting rope, is directly connected to the bell. This is what actually lifts the divers. Its safety factor is colossal—it is 10 times stronger than required to lift the maximum load.
The second rope, slightly thinner at 9 mm, serves as the guide wire. It is attached to a heavy ballast—a 200 kg weight that is the first to go underwater. This rope is threaded through blocks on the bell and the ballast, creating something akin to a guide rail. Thanks to this, the bell is not spun by the current and moves strictly vertically.
The most fascinating part, however, is the safety system. If the primary hoisting rope or its winch fails, the guide wire automatically takes over the hoisting function. It will begin lifting the bell by bearing against the ballast. This is a classic example of engineering redundancy, where the failure of a single component does not lead to disaster.
How Is It Controlled?
All the hydraulic power—two 11 kW electric motors and a 130-liter oil tank—is housed in a separate unit. The operator manages the system via a remote console, which features the highest level of protection against water and sea salt (IP56). The console provides everything necessary: levers for controlling the A-frame and winches, an emergency mushroom button that can be struck in case of danger, and, crucially, a diving depth indicator.
To prevent the divers from crashing into the frame during recovery, the system is equipped with automation. A specialized limit switch on the bracket cuts off the lift as soon as the bell reaches the top. Additionally, inductive sensors on the winches monitor the wire rope to ensure it doesn’t unreel completely, sending a stop signal at the very last moment.
Invisible Cleanliness
The most surprising aspect of such systems is the cleanliness requirements. This isn’t about the deck, but about the hydraulic oil. There must be no particles in the oil larger than 12-16 microns (which is thinner than a human hair). If dirt gets inside, the valves and pumps can fail instantly. Therefore, filling the system is a complete ritual that prevents any dust or debris from entering.
A launching and recovery system is not just a piece of metal, but a sophisticated mechanism designed for a 30-year service life. It is engineered so that even in an extreme situation, divers have a chance to return to the vessel. Behind every movement stands not only hydraulic power but also mathematical precision intended to conquer the harsh elements of the ocean.
| Parameter | Value |
|---|---|
| LARS drive type | Hydraulic |
| Hoisting mechanism lifting capacity, kg, not less than | 750 kg |
| Luffing frame lifting capacity, kg, not less than | 950 kg |
| Guide wire mechanism lifting capacity, kg, not less than | 950 kg |
| Outreach, m | 1,2 m |
| Winch rope winding speed, m/min | 3…15 m/min |
| Bell launching/recovery height, m, not less than | 70 m |
| Rated power of LARS electric motors, kW | 2×11 kW |
| Total LARS weight (including bell and ballast), kg, not more than | 3250 kg |
The equipment complies with the following requirements:
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Personal Data Processing Policy
1. General provisions
This Personal data processing Policy is compiled in accordance with the requirements of Federal Law No. 152-FZ dated 27.07.2006 “On Personal Data” (hereinafter referred to as the Personal Data Law) and defines the procedure for processing personal data and measures to ensure the security of personal data taken by Izhora Hydrosystems Co. Ltd (hereinafter referred to as the Operator).
1.1. The Operator sets as its most important goal and condition for the implementation of its activities the observance of the rights and freedoms of man and citizen in the processing of his personal data, including the protection of the rights to privacy, personal and family secrets.
1.2. This Operator’s policy regarding the processing of personal data (hereinafter referred to as the Policy) applies to all information that the Operator can receive about website visitors https://i-hydro.ru .
2. Basic concepts used in the Policy
2.1. Automated processing of personal data — processing of personal data using computer technology.
2.2. Blocking of personal data — temporary termination of processing of personal data (except in cases where processing is necessary to clarify personal data).
2.3. Website – a set of graphic and informational materials, as well as computer programs and databases that ensure their availability on the Internet at a network address https://i-hydro.ru .
2.4. Personal data information system — a set of personal data contained in databases and information technologies and technical means that ensure their processing.
2.5. Depersonalization of personal data — actions as a result of which it is impossible to determine, without the use of additional information, the identity of personal data to a specific User or other subject of personal data.
2.6. Personal data processing — any action (operation) or set of actions (operations) performed with or without the use of automation tools with personal data, including collection, recording, systematization, accumulation, storage, clarification (updating, modification), extraction, use, transfer (distribution, provision, access), depersonalization, blocking, deletion, destruction of personal data.
2.7. Operator — a state body, municipal body, legal entity or individual, independently or jointly with other persons organizing and /or processing personal data, as well as determining the purposes of processing personal data, the composition of personal data to be processed, actions (operations) performed with personal data.
2.8. Personal data — any information related directly or indirectly to a specific or identifiable User of the Website https://i-hydro.ru .
2.9. Personal data authorized by the subject of personal data for distribution — personal data to which an unlimited number of persons have access by the subject of personal data by giving consent to the processing of personal data authorized by the subject of personal data for distribution in accordance with the procedure provided for by the Law on Personal Data (hereinafter — personal data authorized for distribution).
2.10. User — any visitor to the website https://i-hydro.ru .
2.11. Provision of personal data — actions aimed at disclosure of personal data to a certain person or a certain circle of persons.
2.12. Dissemination of personal data — any actions aimed at disclosure of personal data to an indefinite circle of persons (transfer of personal data) or familiarization with personal data of an unlimited circle of persons, including the publication of personal data in the media, placement in information and telecommunications networks or providing access to personal data in any other way.
2.13. Cross—border transfer of personal data is the transfer of personal data to the territory of a foreign state to the authority of a foreign state, a foreign individual or a foreign legal entity.
2.14. Destruction of personal data — any actions as a result of which personal data is permanently destroyed with the impossibility of further restoration of the content of personal data in the personal data information system and/or the material carriers of personal data are destroyed.
3. Basic rights and obligations of the Operator
3.1. The Operator has the right to:
— receive reliable information and/or documents containing personal data from the subject of personal data;
— if the personal data subject withdraws consent to the processing of personal data, as well as sending a request to terminate the processing of personal data, the Operator has the right to continue processing personal data without the consent of the personal data subject if there are grounds specified in the Law on Personal Data;
— independently determine the composition and list of measures necessary and sufficient to ensure the fulfillment of obligations provided for by the Law on Personal Data and regulatory legal acts adopted in accordance with it, unless otherwise provided by the Law on Personal Data or other federal laws.
3.2. The Operator is obliged to:
— to provide the subject of personal data, at his request, with information concerning the processing of his personal data;
— organize the processing of personal data in accordance with the procedure established by the current legislation of the Russian Federation;
— respond to requests and requests from personal data subjects and their legal representatives in accordance with the requirements of the Personal Data Law;
— to inform the authorized body for the protection of the rights of personal data subjects at the request of this body of the necessary information within 10 days from the date of receipt of such a request;
— publish or otherwise provide unrestricted access to this Policy regarding the processing of personal data;
— take legal, organizational and technical measures to protect personal data from unauthorized or accidental access to them, destruction, modification, blocking, copying, provision, dissemination of personal data, as well as from other illegal actions with respect to personal data;
— stop the transfer (distribution, provision, access) of personal data, stop processing and destroy personal data in the manner and cases provided for by the Law on Personal Data;
— perform other duties provided for by the Law on Personal Data.
4. Basic rights and obligations of personal data subjects
4.1. Personal data subjects have the right to:
— receive information concerning the processing of his personal data, except in cases provided for by federal laws. The information is provided to the personal data subject by the Operator in an accessible form, and it should not contain personal data related to other personal data subjects, except in cases where there are legitimate grounds for disclosure of such personal data. The list of information and the procedure for obtaining it is established by the Law on Personal Data;
— require the operator to clarify his personal data, block or destroy them if the personal data are incomplete, outdated, inaccurate, illegally obtained or are not necessary for the stated purpose of processing, as well as take measures provided by law to protect their rights;
— to put forward a condition of prior consent when processing personal data in order to promote goods, works and services on the market;
— to revoke consent to the processing of personal data, as well as to send a request to terminate the processing of personal data;
— appeal to the authorized body for the protection of the rights of personal data subjects or in court against illegal actions or inaction of the Operator when processing his personal data;
— to exercise other rights provided for by the legislation of the Russian Federation.
4.2. Personal data subjects are obliged to:
— provide the Operator with reliable data about themselves;
— inform the Operator about the clarification (update, change) of their personal data.
4.3. Persons who have provided the Operator with false information about themselves or information about another personal data subject without the latter’s consent are liable in accordance with the legislation of the Russian Federation.
5. Principles of personal data processing
5.1. The processing of personal data is carried out on a legal and fair basis.
5.2. The processing of personal data is limited to the achievement of specific, predetermined and legitimate goals. Processing of personal data incompatible with the purposes of personal data collection is not allowed.
5.3. It is not allowed to combine databases containing personal data, the processing of which is carried out for purposes incompatible with each other.
5.4. Only personal data that meet the purposes of their processing are subject to processing.
5.5. The content and volume of the processed personal data correspond to the stated purposes of processing. Redundancy of the processed personal data in relation to the stated purposes of their processing is not allowed.
5.6. When processing personal data, the accuracy of personal data, their sufficiency, and, if necessary, relevance to the purposes of personal data processing is ensured. The Operator takes the necessary measures and/or ensures that they are taken to delete or clarify incomplete or inaccurate data.
5.7. The storage of personal data is carried out in a form that allows determining the subject of personal data, no longer than the purposes of personal data processing require, unless the storage period of personal data is established by federal law, an agreement to which the subject of personal data is a party, beneficiary or guarantor. The processed personal data is destroyed or depersonalized upon achievement of the processing goals or in case of loss of the need to achieve these goals, unless otherwise provided by federal law.
| Purpose of processing | Informing the User by means of voice communication and e-mail |
|---|---|
| Personal data |
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| Legal grounds |
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| Types of personal data processing |
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7. Terms of personal data processing
7.1. The processing of personal data is carried out with the consent of the personal data subject to the processing of his personal data.
7.2. The processing of personal data is necessary to achieve the goals stipulated by an international agreement of the Russian Federation or a law, to carry out the functions, powers and duties assigned to the operator by the legislation of the Russian Federation.
7.3. The processing of personal data is necessary for the administration of justice, the execution of a judicial act, an act of another body or official subject to execution in accordance with the legislation of the Russian Federation on enforcement proceedings.
7.4. The processing of personal data is necessary for the execution of a contract to which the personal data subject is a party or beneficiary or guarantor, as well as for the conclusion of a contract on the initiative of the personal data subject or a contract under which the personal data subject will be a beneficiary or guarantor.
7.5. The processing of personal data is necessary to exercise the rights and legitimate interests of the operator or third parties or to achieve socially significant goals, provided that the rights and freedoms of the personal data subject are not violated.
7.6. Personal data is processed, access to which is granted to an unlimited number of persons by the subject of personal data or at his request (hereinafter referred to as publicly available personal data).
7.7. Personal data subject to publication or mandatory disclosure in accordance with federal law is processed.8. Procedure for the collection, storage, transfer and other types of personal data processing
The security of personal data processed by the Operator is ensured through the implementation of legal, organizational and technical measures necessary to fully comply with the requirements of current legislation in the field of personal data protection.
8. Procedure for the collection, storage, transfer and other types of personal data processing
The security of personal data processed by the Operator is ensured through the implementation of legal, organizational and technical measures necessary to fully comply with the requirements of current legislation in the field of personal data protection.
8.1. The Operator ensures the safety of personal data and takes all possible measures to exclude access to the personal data of unauthorized persons.
8.2. The User’s personal data will never, under any circumstances, be transferred to third parties, except in cases related to the implementation of current legislation or if the subject of personal data has given consent to the Operator to transfer data to a third party to fulfill obligations under a civil contract.
8.3. In case of inaccuracies in personal data, the User can update them independently by sending a notification to the Operator to the Operator’s email address
contact@i-hydro.ru
8.4. The period of processing of personal data is determined by the achievement of the purposes for which personal data was collected, unless another period is provided for by the contract or current legislation..
The User can withdraw his consent to the processing of personal data at any time by sending a notification to the Operator via e-mail to the Operator’s e-mail address contact@i-hydro.ru marked “Withdrawal of consent to the processing of personal data”.
8.5. All information collected by third-party services, including payment systems, means of communication and other service providers, is stored and processed by these persons (Operators) in accordance with their User Agreement and Privacy Policy. The subject of personal data and/or with the specified documents. The Operator is not responsible for the actions of third parties, including the service providers specified in this paragraph.
8.6. The prohibitions established by the subject of personal data on the transfer (except for granting access), as well as on the processing or processing conditions (except for obtaining access) of personal data permitted for distribution, do not apply in cases of processing of personal data in the state, public and other public interests defined by the legislation of the Russian Federation.
8.7. When processing personal data, the Operator ensures the confidentiality of personal data.
8.8. The Operator stores personal data in a form that allows determining the subject of personal data, no longer than the purposes of personal data processing require, unless the period of personal data storage is established by federal law, an agreement to which the subject of personal data is a party, beneficiary or guarantor.
8.9. The condition for the termination of personal data processing may be the achievement of the purposes of personal data processing, the expiration of the consent of the personal data subject, the withdrawal of consent by the personal data subject or the requirement to terminate the processing of personal data, as well as the identification of unlawful processing of personal data.
9. List of actions performed by the Operator with the received personal data
9.1. The Operator collects, records, systematizes, accumulates, stores, clarifies (updates, changes), extracts, uses, transfers (distribution, provision, access), depersonalizes, blocks, deletes and destroys personal data.
9.2. The Operator performs automated processing of personal data with or without receiving and/or transmitting the received information via information and telecommunication networks.
10. Cross-border transfer of personal data
10.1. Prior to the start of cross-border transfer of personal data, the Operator is obliged to notify the authorized body for the protection of the rights of personal data subjects of its intention to carry out cross-border transfer of personal data (such notification is sent separately from the notification of the intention to process personal data).
10.2. Before submitting the above notification, the Operator is obliged to receive relevant information from the authorities of a foreign state, foreign individuals, foreign legal entities to whom the cross-border transfer of personal data is planned.
11. Confidentiality of personal data
The operator and other persons who have gained access to personal data are obliged not to disclose to third parties and not to distribute personal data without the consent of the subject of personal data, unless otherwise provided by federal law.
12. Final provisions
12.1. The User can receive any clarifications on issues of interest concerning the processing of his personal data by contacting the Operator via e-mail
contact@i-hydro.ru
12.2. This document will reflect any changes to the personal data processing policy by the Operator. The policy is valid indefinitely until it is replaced by a new version.
12.3. The current version of the Policy is freely available on the Internet at https://i-hydro.ru .
