What is requirements of fire detectors as per SOLAS?

SOLAS requirements for fire detector onboard:
  • Operated by heat, smoke, flame or any combination.
  • Smoke detectors – stairways, corridors and escape routes in the accommodation.
  • Smoke detectors to activate when smoke density exceeds 12.5% obscuration per m.
  • Heat detectors to activate at 78deg but not until 54deg is the temperature rises at a rate less than 1deg per min.
  • Avoid placing near beams and ventilation ducts.
  • Max distance between 2 smoke is 11m.
  • Max distance between 2 heat is 9m.

Image of smoke detector and heat detector