Polar Code Explained: IMO Requirements for Ships Operating in Polar Waters

As Arctic and Antarctic shipping activity grows, the rules governing vessels in the world's harshest waters have become essential knowledge for a widening group of operators.

The IMO Polar Code sets mandatory safety and environmental standards for ships operating in polar waters, addressing risks that ordinary SOLAS and MARPOL requirements do not fully cover: sea ice, extreme cold, remoteness from rescue, and vulnerable ecosystems.

What Is the IMO Polar Code?

The Polar Code, formally the International Code for Ships Operating in Polar Waters, is an IMO instrument that sets mandatory requirements for vessels operating in defined Arctic and Antarctic waters. The Code entered into force on 1 January 2017 and is mandatory under both the International Convention for the Safety of Life at Sea (SOLAS) and the International Convention for the Prevention of Pollution from Ships (MARPOL).

The Code exists because polar waters impose demands beyond those of normal operation. Chart coverage may be inadequate, existing charts may contain unsurveyed shoals, rescue may be days away, and polar ecosystems and coastal communities are highly vulnerable to shipping activity. The Polar Code supplements existing IMO instruments to address these risks directly.

The Code is structured in two parts. Part I covers safety: design, construction, equipment, and operation. Part II covers environmental protection: discharge restrictions for oil, noxious liquids, sewage, and garbage. Each part has a mandatory section (A) and a recommendatory section (B).

Which Vessels Need a Polar Ship Certificate?

Any SOLAS ship intending to operate in defined polar waters must hold a valid Polar Ship Certificate. The certificate is issued by the vessel's flag state administration, or an authorized organization acting on its behalf, following a survey.

The certificate classifies the vessel into one of three categories based on the ice conditions it is designed to handle:

• Category A: ships designed for operation in at least medium first-year ice, which may include old ice inclusions.
• Category B: ships not in Category A, designed for operation in at least thin first-year ice, which may include old ice inclusions.
• Category C: ships designed to operate in open water or in ice conditions less severe than Categories A and B.

Before the certificate is issued, the operator must perform an operational assessment that accounts for the anticipated range of operating conditions and hazards, and sets the vessel's operational limitations. Many operators use POLARIS, the Polar Operational Limitation Assessment Risk Indexing System, an IMO-recognized methodology (MSC.1/Circ.1519) for determining a ship's safe operating limits in ice.

What Does the Polar Code Cover?

The Code addresses the full lifecycle of polar operation, from how a ship is built to how its crew is trained. Three areas are central.

Ship Design and Construction (Part I-A)

Part I-A sets structural and equipment standards for polar conditions, including hull strength for ice, protection of fuel and cargo tanks, cold-resistant lifesaving and firefighting equipment, and navigation and communication systems suited to high latitudes. New Category A and B ships face specific structural provisions, such as the protective location of fuel, sludge, and bilge tanks.

Environmental Protection (Part II-A)

Part II-A imposes discharge restrictions stricter than standard MARPOL requirements. Ships face limits on the discharge of oil, noxious liquid substances, sewage, and garbage in polar waters. Ships are also encouraged not to use or carry heavy fuel oil in the Arctic, reflecting the vulnerability of polar ecosystems to pollution.

The Polar Water Operational Manual

Every ship operating in polar waters must carry a Polar Water Operational Manual (PWOM), required under Chapter 11 of the Code. The PWOM is ship-specific: it provides the master and crew with guidance on the vessel's operational capabilities and limitations, and supports decision-making in ice, low temperatures, and remote conditions. Voyage planning before every polar voyage must follow the PWOM.

Polar Code Training Requirements

Chapter 12 of the Polar Code requires that masters, chief mates, and officers in charge of a navigational watch on ships operating in polar waters complete appropriate training. The requirements became mandatory under the STCW Convention and Code from 1 July 2018.

Training is delivered at two levels, reflected in the IMO Model Courses. Basic training, covered by IMO Model Course 7.11, prepares officers for operations in polar waters under SOLAS and MARPOL. Advanced training, covered by IMO Model Course 7.12, goes further into navigation, ice management, and emergency procedures for more demanding conditions. The training certificate itself is issued through approved providers under the seafarer's flag state, separately from the vessel's Polar Ship Certificate.

Polar Code Publications and Reference Materials

Compliance starts with the source text. The Polar Code, 2016 Edition is the consolidated IMO publication containing the full Code, and it is the primary reference for operators, masters, and compliance staff preparing for polar operations. Alongside the source text, the IMO Model Courses 7.11 and 7.12 provide the training frameworks that Chapter 12 requires.

For a vessel preparing its first polar voyage, the combination of the Polar Code text, the relevant model course materials, and an accurate set of polar-region charts is the foundation of a compliant operation.

Navigate Polar Waters Prepared and Compliant

The Polar Code turns the unique hazards of Arctic and Antarctic operation into a clear, mandatory framework. Understanding the ship categories, the certificate, the PWOM, and the training requirements is the starting point for any operator considering polar waters. Shop the Polar Code, 2016 Edition and polar operations training materials, or contact American Nautical Services at +1 (954) 522-3321 or sales@amnautical.com.

Frequently Asked Questions

Here are answers to common questions about the IMO Polar Code.

What is a Polar Ship Certificate?

A Polar Ship Certificate is a mandatory certificate issued by a vessel's flag state administration, or an authorized organization, before the ship operates in polar waters. The certificate classifies the vessel as Category A, B, or C based on the ice conditions it is designed to handle, following a survey and operational assessment.

Does the Polar Code apply to all vessels in the Arctic?

The Polar Code applies mandatorily to SOLAS ships (generally passenger ships and cargo ships of 500 gross tonnage and above) operating in defined polar waters. Fishing vessels must comply with the environmental protection requirements in Part II. IMO has also urged voluntary application of safety measures to non-SOLAS ships.

What training is required for polar water operations?

Chapter 12 of the Polar Code requires masters, chief mates, and navigational watch officers to complete appropriate training, mandatory under STCW since 1 July 2018. Training is delivered at basic and advanced levels, reflected in IMO Model Courses 7.11 and 7.12.

When did the Polar Code enter into force?

The Polar Code entered into force on 1 January 2017. The Code applies to new ships built on or after that date, and to existing ships from their first intermediate or renewal survey after 1 January 2018.

What is a Polar Water Operational Manual (PWOM)?

The PWOM is a ship-specific manual required under Chapter 11 of the Polar Code. The manual provides the master and crew with guidance on the vessel's operational capabilities and limitations in polar conditions and supports voyage planning for every polar voyage.

Where can I buy the current Polar Code publication?

The Polar Code, 2016 Edition, the consolidated IMO publication containing the full Code text, is available from American Nautical Services, along with the IMO Model Courses 7.11 and 7.12 for polar waters training.