Start Water Spray Sign

The Start Water Spray Sign is a mandatory-action instruction placard marking the manual activation point for a vessel’s fixed water spray or deluge fire suppression system. Found on tankers, gas carriers, and vessels carrying deck cargoes exposed to radiant heat, this sign identifies the valve or control station crew must operate to begin water spray cooling of exposed tank domes, cargo manifolds, and adjacent structure during a fire emergency or heat-exposure incident on deck.

Why a Start Water Spray Sign Is Critical Under SOLAS Chapter II-2

SOLAS Chapter II-2 requires certain tankers and gas carriers to be fitted with fixed water spray systems protecting exposed tank domes, valve manifolds, and superstructure from radiant heat during a fire involving cargo or an adjacent vessel. In an emergency, seconds matter – crew responding to a fire alarm must be able to locate and operate the correct valve immediately, without hunting through unmarked piping. A start water spray sign posted directly at the activation valve or remote control station removes that uncertainty, giving an unambiguous, durable instruction that survives years of weather exposure on open deck.

Start Water Spray Sign: Typical Locations Onboard

The start water spray sign is typically fitted at or near:

• Fixed water spray system manual valve stations on deck
• Remote hydraulic or pneumatic actuator panels for deluge systems
• Cargo manifold area valve chests on tankers and gas carriers
• Fire control station panels referencing the deck water spray zone

Because these valves are often grouped with other deck fire-fighting controls, clear individual signage prevents the wrong valve being operated under the pressure of a genuine emergency.

” alt=”start water spray sign MS0035″ />

Durable Marking for Exposed Deck Service

Our start water spray sign is produced in rigid, UV-stabilised, corrosion-resistant material suited to continuous open-deck exposure on tankers and gas carriers. The high-contrast lettering remains legible after years of salt spray, sun exposure, and routine deck washdown, and the sign is sized for direct valve-wheel or actuator-panel mounting so the instruction is impossible to miss during an emergency response.

For related fixed fire-fighting system signage, see our Start Air Supply Sign, and browse the complete Mandatory Signs collection for the full IMO-compliant range. For background on fixed water spray system requirements, see the IMO’s SOLAS Chapter II-2 fire protection guidance.

Order your Start Water Spray Sign today in durable, marine-grade material sized to suit your valve station or control panel mounting location, and ensure this critical activation point is instantly identifiable during a deck fire emergency.

Start Water Spray Sign: Part of a Wider Fire Safety Plan

The start water spray sign should be read alongside the vessel’s Fire Safety Plan and Fire Control Plan, which identify the exact zone each deluge valve protects and the sequence of actions crew should follow when a fire is detected near cargo tanks or manifolds. During class surveys and Port State Control inspections, fixed water spray systems are checked for both mechanical function and clear identification signage – a missing or faded start water spray sign at a critical valve station is treated as a genuine deficiency because it directly affects response time in an emergency. Fitting a durable, correctly worded sign at every deluge valve and remote actuator panel keeps the vessel’s fire safety documentation aligned with what crew will actually find on deck when it matters most.

A Vital Marking for Rapid Emergency Response

Crew training and fire drills are only as effective as the signage that guides responders to the right valve under pressure. A clearly worded start water spray sign at every relevant control point closes the gap between a well-drilled crew and an actual emergency, ensuring the correct system is activated within the critical first minute of a deck fire response.