Under Maintenance Sign

Under Maintenance Sign – ISO 7010 Warning Symbol HS0047

This Under Maintenance sign warns crew and contractors that the equipment or area nearby is currently undergoing maintenance and may be in an unsafe or unfinished state until work is complete. The sign combines the standard black exclamation triangle with a bold “DANGER – Under maintenance” text panel beneath it, giving anyone approaching the area an instant visual cue plus an explicit written instruction in a single fixture.

As SKU HS0047 in the Hazard Signs range, it is built for continuous marine exposure and suits temporary tagging of equipment, walkways, plant and machinery during scheduled or unscheduled maintenance work.

The upper section shows the familiar black exclamation mark inside a warning triangle, while the lower panel spells out “DANGER” in bold capitals followed by “Under maintenance” in smaller text, a combined pictogram-and-wording format that gives crew a clear, temporary marker distinct from the vessel’s permanent hazard signage.

Because equipment under maintenance may have guards removed, power partially isolated or components disassembled, the written panel gives crew and visiting contractors the specific context a generic triangle alone cannot provide. The photoluminescent base keeps the under maintenance warning visible for a period after lighting fails, useful during extended maintenance periods that span shift changes or drills.

Why Under Maintenance Marking Matters

Equipment left partially reassembled or with safety guards temporarily removed during maintenance is a recognised cause of injury when another crew member assumes it is back in normal service. Clear under maintenance signage at every affected location supports lock-out/tag-out and permit-to-work procedures, and reminds crew not to operate or rely on equipment until the maintenance team has formally cleared it. It also gives supervisors a clear reference point when briefing the watch on which systems are temporarily out of normal configuration.

Compliance and Certification

This sign is produced to align with IMO shipboard safety signage guidance and the combined pictogram-and-text warning format used across shipping and industrial machinery safety, supporting the ISM Code’s requirement for documented control of maintenance-related hazards. A visible under maintenance warning at any equipment being serviced is a documented control that classification surveyors and internal safety auditors expect to see during a permit-to-work review.

Installation Recommendations

Position the sign directly on or immediately beside the equipment, panel or walkway under maintenance, at a height that is seen before the item is approached or operated. The self-adhesive backing suits quick, temporary placement for the duration of the work, while the pre-drilled fixing option is available for recurring maintenance points that are tagged out regularly. Remove the sign promptly once the maintenance team has confirmed the equipment is safe and returned to normal service.

• 425 x 567mm rigid or self-adhesive format for steel, aluminium or GRP surfaces
• Photoluminescent base for visibility during power loss or blackout drills
• UV-stable, saltwater-resistant construction for long-term exterior exposure
• Self-adhesive or pre-drilled fixing options for fast, secure installation
• Combined pictogram and bold English text for added clarity beyond the symbol alone

Order the HS0047 Under Maintenance sign today to mark every piece of equipment currently being serviced before your next permit-to-work audit. Safety Sign Hub stocks the complete IMPA/ISSA-coded hazard sign range and ships marine-grade signage across Australia and to vessels in port, with bulk pricing for fleet orders.

See the full Hazard Signs range for related ISO 7010 warning pictograms, or browse our Fire Fighting Signs for IMO A.654(16) fire control signage to complete your vessel’s safety signage plan.