DNV Rules for Ships - July 2022 edition (2023)

The 2022 July edition of the DNV rules is now available at www.dnv.com.

DNV Rules for Ships - July 2022 edition (1)

General information

New and updated rules were formally approved on June 17th 2022 by Group CEO Remi Eriksen and are included in the July 2022 edition.

The main changes to the rules cover:

  1. New and revised class notations
  2. Implementation of external requirements (IACS and IMO)
  3. General updates and corrections

The general entry into force date for these rules is 1st of January 2023. The rules may, however, be applied to projects contracted before this date upon agreement between parties.

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Also in this year’s publication, rules having retroactive entry into force have been included in Pt. 7 Ch. 2.

For more information on the changes, please contact your local DNV office.

In addition to the changes in the rules for Ships, smaller changes have also been made to rules for:

  • Yachts
  • Naval vessels
  • High speed and light crafts
  • Inland navigation vessels
  • Floating docks
  • Underwater technology

Rules for Offshore Units will be presented separately.

Below is given a general overview of the main changes in the rules for Classification of Ships.

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Rules for ships

Main class

TopicRule reference DNV-RU-SHIPMain topcis
Podded and geared thrustersPt. 4 Ch.5 Sec. 3
  • Automatic restart after power failure
  • Steering gear redundancy on system level

Ship type notations

TopicRule reference DNV-RU-SHIPMain updates
Bulk carriers and dry cargo shipsPt.5 Ch.1 Sec.3
  • Requirements for steel coil loading
Liquefied gas tankersPt. 5 Ch. 7
  • Type B LNG tanks welding and NDT
Windfarm service vesselPt. 5 Ch. 9 Sec.5
  • New ship type notation - Windfarm service

Additional class notations

TopicRule reference DNV-RU-SHIPMain updates
Gas fuelled ship installationsPt.6 Ch.2 Sec.5
  • Maximum probable leakage in fuel systems
Gasoline fuel installationsPt. 6 Ch. 2 Sec. 6
  • New class notation - Gasoline INST - for gasoline fuel installations for refuelling of crafts stored onboard
Redundant and alternative propulsionPt. 6 Ch. 2 Sec. 7
  • Introduced class notation for alternative propulsion - AP
  • Introduced new qualifier – B - for redundant propulsion
Wind assisted propulsion systemsPt. 6 Ch. 2 Sec. 12
  • Class notation - WAPS - made mandatory when equipment installed
  • Introduced specific stability criteria
Gas fuelled ammoniaPt. 6 Ch. 2 Sec. 14
  • Introduced requirement for cofferdam and A60 insulation between fuel preparation room and machinery space category A
Navigation, manoeuvring and position keepingPt. 6 Ch. 3
  • DP operations with closed bus-tie. New qualifiers introduced
Container ships anti roll measuresPt. 6 Ch. 4 Sec. 16
  • New class notation – ARCS – introduced to support in avoiding excessive roll motions
Platform supplyPt. 6 Ch. 5 Sec. 15
  • Tank venting and alternative designs to meet IMO OSV code
MooringPt. 6 Ch. 5 Sec. 25
  • Introduced new class notation – Mooring – to facilitate compliance with SOLAS II-1/3-8 Mooring and towing
Occasional carriage of dry bulk cargoPt. 6 Ch. 5 Sec. 26
  • Introduced new class notation – SBC – to facilitate compliance with IMO MSC. 277(85)
Tail shaft monitoringPt. 6 Ch. 9 Sec. 4
  • For class notation TMON - introduced new qualifier - + - to show enhanced control with the shaft arrangement
Data driven verification for navigation systemsPt. 6 Ch. 11 Sec. 4
  • Introducing new class notation – NAUTConnect – facilitating cost effective and efficient system health monitoring and compliance verification

Topic updates commented

Below a few comments to a selected part of the updates are offered.

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Systems and components (Pt. 4)

  • Rotating machinery – Driven units / Podded and geared thrusters (Ch. 5 Sec. 3)
    • Introduced requirements for main and auxiliary steering gear power units to restart automatically upon power being restored after power failure.
    • Removed steering gear requirement for redundancy on component level, accepting an overall system redundancy principle.

Ship types (Pt. 5)

  • Bulk carriers and dry cargo ships / Steel coil requirements (Ch. 1 Sec. 3)
    • Calculations for inner bottom section modulus to be based on stiffener bending span
  • Liquefied gas tankers (Ch. 7)
    • Clarified that for type-B LNG fuel tanks, alternative means to meet the overall safety standard (ISO 10042 and 5817 quality level B) may be accepted.
  • Service vessels / Windfarm service (Ch. 9 Sec. 5)
    • New class notation Windfarm Service meeting market need in relation to e.g. floating wind park service and maintenance.

Additional class notations (Pt. 6)

  • Propulsion, power generation and auxiliary systems (Ch. 2)
    • Gas fuelled ship installations (Sec. 5)
      • Clarified the requirements in relation to maximum probable leakages in fuel systems as being an essential safety parameter for designs and operations.
    • Low flashpoint liquid fuelled engines (Sec. 6)
      • Introduced new class notation Gasoline INST covering gasoline fuel installations used for refuelling of crafts, typically stored on board passenger vessels.
    • Redundant and alternative propulsion (Sec. 7)
      • Introduced a class notation – AP - covering alternative propulsion installations. Intended for design solutions with reduced propulsion power, e.g. intended to bring vessel home after failures on the main propulsion line. This notation is replacing previous notation RP(1) and being adapted to market requests.
      • Introduced new qualifier - B – for the class notation redundant propulsion – RP. The qualifier sets up requirements more lenient than given by qualifier 2, but still meets the overall intention of a redundant propulsion and steering arrangement where all proulsors are designed for parallel operation.
    • Wind assisted propulsion systems – WAPS (Sec. 12)
      • Experience and market development shows larger systems being installed, thus specific stability requirements are introduced and consequently the class notation is also made mandatory for vessels with wind assisted propulsion systems installed.
    • Gas fuelled ammonia (Sec. 14)
      • Introduced requirement for cofferdam and A60 insulation between fuel preparation room and machinery space category A, taking into account thepossible toxic hazard should a fire propagate between spaces.
  • Navigation, manoeuvring and position keeping (Ch. 3)
    • Based on market feedback, where more flexible solutions for low emission and energy efficient operations based on closed bus-tie systems are requested, the ship rules are aligned with the present offshore class rules for DP3 and also opens for closed bus-tie operations for DP2. Three new qualifiers are offered, covering basic closed bus-tie operation - CB, built in simulation test capabilities – CBS and live short circuit and earth fault testing - CBT.
  • Cargo operations / Anti roll measures for container ships (Ch. 4 Sec. 16)
    • Market request for support to avoid loss of containers through an increased ability to minimize excessive roll moptions.
    • Offering a new class notation ARCS with possibility to include a predictive roll software application (PSA) and/or an anti roll device (ARD).
  • Platform Supply (Ch. 5 Sec. 15)
    • For conversion of ships for compliance with the OSV code, discussions with NMA and MCA have resulted in alternative solutions in meeting the code for tank venting and gas detection arrangements. This will give more flexibility for redesign of existing vessels and also free more deck area for dry cargo.
  • Mooring (Ch. 5 Sec. 25)
    • Mooring requirements of SOLAS II-1/3-8 Mooring and towing have been amended, formally entering into force in 2024. The new class notation Mooring facilitates early compliance with SOLAS.
  • Occasional carriage of dry bulk cargo (Ch. 5 Sec. 26)
    • Resolution MSC.277(85) provides safety requirements for ships engaged in occasional carriage of dry bulk cargo which are not considered bulk carriers.
    • The requirements are presently applied as mandatory for ship types General dry cargo ship and MPV (Pt. 5 Ch. 1).
    • Moving the requirements of the resolution into a new class notation – SBC – being mandatory for vessels designed for occasional carriage of dry bulk cargo having length above 150m and five cargo holds or more only.
    • Introduces more flexibility in market and less cost for smaller vessels.
  • Navigation systems data driven (Ch. 11 Sec. 4)
    • Offering a new class notation NAUTConnect.
    • Introducing data driven communication and verification of nautical systems, addressing onboard and onshore systems and infrastructure. The notation supports automatic collection and analysis of key system parameters,

Information in relation to rules with retroactive entry into force

New retroactive rule changes are given in RU-Ship Pt.7 Ch.2.

The introduced retroactive requirements are valid for newbuilds and conversions with contract for construction on or after the entry into force date given in the rules.

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Two-island container ships: The first rule change is related to calculation of the global bi-moment and leads to reduced and more realistic hull torsion deformation and subsequent warping stresses. This rule change is retroactively entering into force 1st January 2022.

Container ships with upper structure of thick plates: The second rule change corrects the application of non-destructive testing (NDT) for upper hull girder of container ships having a coaming built of “thick steel plates”. This correction is accompanied with clarifications, simplifying the application of requirements for brittle crack arrest (BCA) designs. This rule change is retroactively entering into force 1st January 2019.

Information on coming rule editions

DNV publishes main rule editions annually. The next main rule edition will be published in July 2023.

Additional amendments may be carried out, and all amendments will be specifically marked here:

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Service Responsible – Ship Class


What are DNV standards? ›

As a classification society, DNV sets standards for ships and offshore structures, known as Class Rules. They comprise safety, reliability and environmental requirements that vessels and other offshore mobile structures in international waters must comply with.

What is type of ship? ›

They are further classified as: Liners, Cruise Ships, Pilgrimage Ships. Cross Channel Ferries, Coastal Ferries, Harbour Ferries. Arctic and Antarctic Cruises.

What is a condition of class? ›

Recommendations/Conditions of Class

'Recommendation' and 'Condition of Class' are different terms used by IACS Societies for the same thing, i.e. requirements to the effect that specific measures, repairs, surveys etc. are to be carried out within a specific time limit in order to retain class.

Why is DNV certification important? ›

Certification, or registration, to a standard is the outcome of a successful assessment by an independent third party such as DNV. Whether certification of a management system, product or a project, it provides evidence of your compliance according to national or international standards.

What is DNV GL approval? ›

The DNV GL approval of manufacturer (AoM) scheme is a procedure by which the Society approves manufacturers for supply of products in accordance with the Society's rules and standards.

What is a 3 mast ship called? ›

A barque, barc, or bark is a type of sailing vessel with three or more masts having the fore- and mainmasts rigged square and only the mizzen (the aftmost mast) rigged fore and aft.

Is classification of ship mandatory? ›

A classification certificate issued by a classification society recognised by the proposed ship register is required for a ship's owner to be able to register the ship and to obtain marine insurance on the ship, and may be required to be produced before a ship's entry into some ports or waterways, and may be of ...

What is period of class in shipping? ›

After the said temporaray arrangements are in place, he will allow the ship to sail for one voyage or for some time period. Class does so by issuing a "Condition of class", Which means that to be able to retain the class, the said defect need to be renewed before the specified period.

Why class is required for a ship? ›

Class defines a technical and safety standards of a ship, which reflects the risk of insuring ship. Determination of fitness. Meet requirement of Jurisdiction. Possible lower insurance premiums.

What is DNV Inspection? ›

DNV vendor inspection and surveillance assures compliance and monitors manufacturing processes, while our expediting services help you meet overall project timelines and budgets. We operate a global operating model supported by cloud-based technology platforms.

How do you get a DNV accreditation? ›

Below you will find 10 general steps that will take you down the road to certification:
  1. Obtain the standard. ...
  2. Review literature and software. ...
  3. Assemble a team and define your strategy. ...
  4. Determine training needs. ...
  5. Review consultant options. ...
  6. Develop your management system documentation. ...
  7. Determine, manage and document your processes.

Is DNV a good company? ›

DNV is a professional approach Organization. working culture is one of top notch. Managers are cooperative and understanding. Working environment is very good.Female employees are treated with outmost respectfully.

What is type approval certificate? ›

Type Approval is a certification scheme intended to enhance the confidence of the buyer about the product under consideration and building assuring that the product conforms to recognize National/International - Standards/Codes/Conventions and/or the IRS Rules, through a process of documentation review, design ...

What is ABS Type Approval? ›

ABS Type Approval

ABS certifies companies that provide services, such as measurements, tests, or maintenance, of safety systems and equipment. Additionally, ABS certifies individual materials, components, products and systems used on the vessels through a technical evaluation and survey of manufacturing compliance.

What is Process certification? ›

It is the formal attestation or confirmation of certain characteristics of an object, person, or organization. This confirmation is often, but not always, provided by some form of external review, education, assessment, or audit. Accreditation is a specific organization's process of certification.

How many veins are in the heart? ›

Two large veins that lead into the heart are the superior vena cava and inferior vena cava. (The terms superior and inferior don't mean that one vein is better than the other, but that they're located above and below the heart.)

Which type of ship is best? ›

According to the result, Tankers are the safest! They have a 0.54% loss in relation to their total population. To put it more simply, one tanker ship is lost at sea for every 184 of them. Tanker vessels are also three times safer than passenger ships having 1.5% losses of their entire population than 0.54%.

What is big ship called? ›

flagship. noun. a large ship that leads a group of ships.

What are 5 types of container ships? ›

Container ships are categorised into seven major categories, depending on their size. These include Small feeder ships, feeder ships, feeder max, Panamax, Post-Panamax, New Panamax and Ultra Large.

What are the 5 types of cargo? ›

There are five main cargo types:
  • Containers. This is the cargo that most laymen are familiar with. ...
  • Dry Bulk Cargo. Next, we have dry bulk cargo which is usually homogenous, in large quantities, and unpacked. ...
  • Liquid Bulk Cargo. ...
  • Break Bulk. ...
  • Roll-On Roll-Off. ...
  • Getting Freight Management Services.

What is shipping by boat called? ›

Ocean freight, also called sea freight, is the movement of goods internationally by sea. Ocean freight is far and away the most popular option for shipping goods internationally. Roughly 90% of goods1 are transported around the world by sea.

What is a 5 masted ship called? ›

Royal Clipper is a steel-hulled five-masted fully rigged tall ship used as a cruise ship.

What is a 4 masted ship called? ›

9) The Bark (Barque)

They had four masts, each bearing square sails on the fore topmast and fore-and-aft sails on the aft mast. These vessels were commonly used by traders to carry extremely high volumes of cargo from Australia to Europe.

What is a boat with 2 sails called? ›

The sloop is the most common sailboat. It has a mast, two sails, commonly a Bermuda rigged main and a headsail.

Can a ship sail without a class certificate? ›

A ship without certificates is a dead ship. It is impossible to sail a ship in high seas without valid certificates. Also any insurance taken up by the ship owner will be null and void if any certificate is invalid and expired.

What is the difference between class and flag? ›

Class is seen as a key resource on technical issues, but the flag also has technical and operational expertise,” says Simon Bonnett, IRI's Senior Vice President, Technical. “Part of our responsibility is to have expertise on each vessel in our fleet.

What is flag state of a ship? ›

The flag state of a merchant vessel is the jurisdiction under whose laws the vessel is registered or licensed, and is deemed the nationality of the vessel.

How many types of ships are there? ›

Merchant ships are ships used for commercial purposes and can be divided into four broad categories: fishing, cargo ships, passenger ships, and special-purpose ships.

What is BIS notation? ›

BIS. This class notation denotes that the ship is allowed for the in water survey of the hull and does not need to be dry docked every 2.5 years.

What Is Intact Stability Code B? ›

Intact Stability Code

The IS Code included fundamental principles such as general precautions against capsizing (criteria regarding metacentric height (GM) and righting lever (GZ)); weather criterion (severe wind and rolling criterion); effect of free surfaces and icing; and watertight integrity.

What is a class 1 ship? ›

The classes of passenger ships are as follows: Class I - ships engaged on voyages any of which are long international voyages. Class II - ships engaged only on voyages any of which are short international voyages.

What is a class 2 vessel? ›

Class 2 Working boats

All vessels that carry less than 12 passengers, (no matter what length) including tugs, water taxis, barges and lighters, smaller ferries, utility vessels of all types.

What does IACS stand for in shipping? ›

International Association of Classification Societies (IACS) is an association of 11 classification societies. These Societies establish and apply technical requirements for the design, construction and survey of marine-related facilities, principally ships and offshore structures.

What does DNV company do? ›

We provide classification, technical assurance, software and independent expert advisory services to the maritime, oil & gas and energy industries. We also provide certification services to customers across a wide range of industries.

What is the difference between Joint Commission and DNV? ›

DNV has accredited about 300 hospitals with another 80 or so awaiting accreditation, according to Horine. In comparison, the Joint Commission has accredited about 4,200 hospitals and another 380 critical access hospitals.

What is DNV Inspection? ›

DNV vendor inspection and surveillance assures compliance and monitors manufacturing processes, while our expediting services help you meet overall project timelines and budgets. We operate a global operating model supported by cloud-based technology platforms.

What is the function of Det Norske Veritas in the United States? ›

About DNV. We are the independent expert in assurance and risk management. Driven by our purpose, to safeguard life, property and the environment, we empower our customers and their stakeholders with facts and reliable insights so that critical decisions can be made with confidence.

Is DNV a good company? ›

DNV is a professional approach Organization. working culture is one of top notch. Managers are cooperative and understanding. Working environment is very good.Female employees are treated with outmost respectfully.

Is DNV a public company? ›

DNV Holding is a private limited company registered in Norway and is fully owned by Stiftelsen Det Norske Veritas.

Is DNV a foundation? ›

Stiftelsen Det Norske Veritas is a free-standing, autonomous and independent foundation whose purpose is to safeguard life, property and the environment.

How many Joint Commission standards are there? ›

The hospital accreditation standards number more than 250, and address everything from patient rights and education, infection control, medication management, and preventing medical errors, to how the hospital verifies that its doctors, nurses, and other staff are qualified and competent, how it prepares for ...

How often are DNV surveys? ›

DNV Survey Process

DNV performs an on-site survey every year. The surveys are done using Tracer Methodology (per ISO 9001), staff interviews, and patient interviews.

What does Hfap stand for? ›

The Healthcare Facilities Accreditation Program (HFAP) is a nationally recognized accreditation organization with deeming authority from CMS.

How do you get a DNV accreditation? ›

Below you will find 10 general steps that will take you down the road to certification:
  1. Obtain the standard. ...
  2. Review literature and software. ...
  3. Assemble a team and define your strategy. ...
  4. Determine training needs. ...
  5. Review consultant options. ...
  6. Develop your management system documentation. ...
  7. Determine, manage and document your processes.

How many employees does DNV have? ›

Number of people employed by DNV GL worldwide 2015-2019

As of 2019, the employees of the company amounted to 11,832, almost 270 less than in the previous year.

What do most hospitals use for accreditation? ›

The Joint Commission accredits more than 4,000 facilities throughout the United States, which accounts for approximately 78 percent of hospitals. Other agencies approve an additional 11 percent, bringing the total number of accredited healthcare facilities to 89 percent.

What is DNV mission statement? ›

Our Mission

D.N.V. College believes in its mission statement that every student who passes through the portals of the College emerges as a wholly developed individual symbolizing the spirit of enterprise and inquiry that characterizes D.N.V. College.

What does Niaho mean? ›

Acronym. Definition. NIAHO. National Integrated Accreditation for Healthcare Organizations (standards)

How many hospitals use DNV? ›

Sustainable healthcare

More than 2400 healthcare industry organizations worldwide trust us for their hospital accreditation, certification and training needs, including more than 500 hospitals in the United States.


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