Integrating Water-Mist Lances With a Per-Vehicle Detection Layer
Draft SOLAS amendments under II-2/10.7.3.1 set functional requirements for water mist lances. Their effectiveness depends entirely on the detection layer above them.
Water-mist lances — Marioff HI-FOG and competing systems — give crew the ability to inject water mist directly into a battery pack through the underbody, cooling the cells without flooding the deck. The IMO draft amendments under II-2/10.7.3.1 set functional requirements that align with this capability. The system's practical effectiveness depends on what the detection layer hands to the crew.
The dependence on detection
- The lance has to be deployed to a specific vehicle. Without localisation, the operator is searching.
- The cooling effect is local — pack-level. Deck-level water flow is a different regime.
- Deployment is most effective in the early pre-vent window. Late deployment competes with the runaway in progress.
Integration points with the detection layer
A red-state alarm has to carry the deck coordinates, bay position, and ideally the side of the vehicle pointing to the access lane. Bridge issues the lance team with that information; the team approaches the right vehicle without a search interval. The integration is procedural, not electronic — the data layer is upstream.
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