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Class-Notation Witnessed Test Program — End-to-End

By Engineering — Compliance · April 27, 2026 · 7 min read

An IACS member society ran a full witnessed test programme against its fire-safety notation criteria. Twelve days, eighteen events, and an audit package the owner can present to charterers.

A PCTC operator engaged us to run a witnessed test programme against the fire-safety notation published by an IACS member class society. The objective was the notation itself, but the value to the operator was wider: a documented capability statement they could present to underwriters and charterers in 2026 fixture conversations.

How the programme was structured

  • Twelve days of witnessed testing, split between bench facility and a single instrumented vessel deck.
  • Eighteen events spanning sub-runaway thermal anomalies, cell-level abuse, and pack-level pre-vent profiles.
  • Two surveyors present full-time, with independent timing and recording equipment.
  • A pre-agreed acceptance band defined by the notation rule, not by us.

Acceptance criteria

  • Detection latency within published target across all eighteen events.
  • False-positive rate within tolerance during a separate undisturbed observation window.
  • Retention and audit-trail integrity verified by the surveyors' independent capture.
  • Behaviour under partial network damage demonstrated with surveyor-observed cable break.

Outcome

18/18
Events detected within acceptance band
0
False positives in 96-hour observation window
< 4 s
End-to-end measurement → bridge red-state, witnessed
Granted
Notation status after surveyor report

What the operator did with the notation

The operator presented the notation and the underlying surveyor report in two P&I renewal conversations and one major charterer fixture conversation. Outcomes are commercial and confidential, but the operator has expanded the programme to two further vessels and is targeting fleet-wide notation across its EV-mix routes by end of 2026.

A class notation is the regulatory mandate the trade is using in 2026 — voluntary, contractual, and faster than IMO. The witnessed test programme is the work.
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