How Insurers Evaluate a Detection Layer

The insurance market does not evaluate a vehicle-deck detection layer on whether it alarms — it evaluates whether the evidence holds up. Across four independent evaluations in RoRoSafe's pipeline — a marine hull underwriter, a Lloyd's syndicate, a P&I club and a loss adjuster — the deciding question was the same: is the telemetry reliable, retained and admissible enough to change how a claim or a premium is set?

What the underwriters actually tested

Not detection alone — evidence reliability. A marine hull underwriter ran a six-week evaluation across a bench rig and a single-deck deployment, both reporting to a third-party log store the underwriter controlled, testing detection latency under three staged abuse profiles, time-series retention and chain-of-custody, and behaviour under partial network damage. A Lloyd's hull syndicate ran an eight-week version with three evaluators and read-only access, adding a false-positive test against a six-month historical replay. In both, the criteria were weighted toward whether the data could survive scrutiny in a claims file, not whether an alarm simply fired.

The outcomes that moved a premium

The Lloyd's syndicate accepted the evidence package and adjusted the premium band for the operator's fourteen in-service vessels carrying the system; the hull underwriter's evaluation cleared it for a premium-band reduction trial beginning 2026 H2. A member club of the International Group went further and co-funded a twelve-week pilot on two PCTCs — five vehicle decks — measuring not only detection (about 22 minutes average lead over deck-zone smoke, two pre-fire events caught at the Stage 2/3 transition, zero false alarms outside calibration) but operational impact, casualty-readiness and loading discipline. Its recommendation to the operator was specific: keep the system, extend fleet-wide by 2027 H2, and present the rollout at the next P&I renewal.

The claims-evidence question

The clearest signal came from a loss adjuster. After a non-casualty thermal event on a pilot vessel, a major adjusting firm asked whether the telemetry could have been entered into a claims file as evidence. The trial built the answer: a signed, timestamped data export covering the event window plus twenty-four hours either side, a documented chain of custody from the vessel server to the adjuster's evidence locker, and a reproducibility procedure letting the adjuster re-derive every alarm decision from the raw data. The standardised export was accepted for claims evidence — moving the conversation from 'trust the vendor' to 'here is the record.'

Why evidence beats alerting to an underwriter

The through-line across all four evaluations is that underwriters and clubs price uncertainty. A casualty they can reconstruct from signed, retained, reproducible data is a cheaper and more predictable claim than one built on assertion, so the evaluations weighted retention, tamper evidence and chain-of-custody as heavily as detection latency. Meeting those evidence criteria — not merely catching fires — is what changed a premium band and what earned a place in a claims file. Detection performance is necessary; on its own it does not move a rate.

What it means for owners and underwriters

For owners, the detection layer's insurance value is unlocked by its evidence architecture, not only its sensors: a system that produces admissible, retained records is one an underwriter can actually rate. For underwriters and clubs, these four evaluations sketch a repeatable methodology — independent read-only access, staged abuse profiles, a historical false-positive replay, and a claims-handoff test — that any market can run before it prices the risk. That methodology, more than any single result, is the template now shaping how the layer is presented across the insurance market.

Sources

• RoRoSafe evaluation records (clients under NDA): marine hull underwriter — six-week bench + single-deck evaluation, cleared for a premium-band reduction trial (2026 H2).
• RoRoSafe evaluation records — Lloyd's hull syndicate: eight-week independent assessment; 3/3 abuse profiles detected within latency, zero tamper-evidence failures, premium band adjusted for 14 in-service vessels.
• RoRoSafe evaluation records — International Group P&I club: twelve-week co-funded pilot, two PCTCs / five decks; ~22 min average detection lead, two pre-fire events caught, zero false alarms outside calibration.
• RoRoSafe evaluation records — loss-adjusting firm: claims-data handoff trial; signed, chain-of-custody export accepted for claims evidence.
• IUMI — "Risk mitigation for the safe ocean and short-sea carriage of electric vehicles" (2023, updated 2025): early detection and short detection-to-confirmation intervals as underwriting priorities; claims-grade event data weighed at renewal.