Storage Testing vs. Polar Survival: What Immersion Suits Really Need

Published by White Glacier Manufacturing Corp.

When a mariner falls into Arctic waters, they have minutes — not hours — before cold incapacitation sets in. The suit on their back is the difference between survival and tragedy. Yet the international standard most vessels rely on was never designed, tested, or validated for polar conditions.

That is the uncomfortable truth at the center of modern polar maritime safety.

A Standard Built for a Different World

Conventional Life-Saving Appliance (LSA) immersion suits are tested against a set of criteria established for temperate and sub-Arctic environments. They must survive storage in cold lockers, resist UV degradation, and maintain basic buoyancy. What they are not required to do is keep a person alive in water temperatures near freezing, under wind chill conditions that can reach −30°C, for the duration that a polar rescue realistically demands.

Storage survival and human survival are not the same test. One measures a material. The other measures a life.

The Polar Code Gap

The IMO Polar Code, which entered into force in 2017, includes Chapter 8 provisions governing survival craft and personal protective equipment. Those provisions are goal-based: vessels operating in polar waters must ensure their equipment is appropriate for the environmental conditions of the voyage.

The goal is clear. The enforcement is not.

In practice, many polar-operating vessels carry standard LSA suits and consider their Polar Code obligations met. Flag states rarely inspect with polar-specific criteria in mind. Port State Control authorities apply the same checklists in Tromsø as they do in Tenerife.

The gap between the written standard and operational reality is not a regulatory technicality. It is a survival gap — and it grows every season as more vessels push further into ice-affected waters.

What Genuine Polar Testing Looks Like

In 2022, White Glacier's Arctic 10+ suit underwent independent cold-water immersion testing at Ergopro's facility in Trondheim, Norway — one of the world's most rigorous polar survival testing environments. Test subjects wearing the Arctic 10+ experienced a core body temperature drop of just 0.5°C over six hours of immersion under −30°C wind chill conditions.

That is not a laboratory result. That is survival data under conditions that closely replicate a real polar man-overboard event.

No standard LSA suit has been tested to this standard, because no standard LSA suit was designed to meet it.

The Path Forward Is Enforcement, Not a New Standard

Some argue the answer is a new prescriptive "Polar Immersion Suit" classification at the IMO. White Glacier's position is different: the goal-based requirements of Polar Code Chapter 8 already demand what is needed. The question is whether flag states and Port State Control authorities are enforcing those requirements against the operational reality of polar voyages.

Consistent enforcement — supported by guidance through PSC circulars and clarification under MSC.1/Circ.1614/Rev.1 — would compel operators to ask the right question: does this suit actually protect a person in the waters where this vessel operates?

That question, honestly answered, changes what gets purchased and what gets worn.

The Cost of the Status Quo

The Northern Sea Route is seeing record transits. Arctic expedition cruise passenger numbers grow every year. Fishing fleets operate year-round above 60°N. Each of these industries depends on survival equipment that performs when it matters most.

A suit that passes a storage test but fails a survival test is not a life-saving appliance. It is a false assurance — and in polar waters, false assurances cost lives.

The standard exists. The evidence exists. What is needed now is the will to enforce both.

White Glacier Manufacturing Corp. designs and manufactures the Arctic 10+ and Arctic 25+ polar immersion suits, validated through independent cold-water testing and recognized by Lloyd's Register, NOAA, and the Chilean DIRECTEMAR. For technical specifications or regulatory inquiries, contact djacobson@whiteglacier.com.