ISO 17884:2004 PDF

Overview - ISO 17884:2004 (Searchlights for high‑speed craft)

ISO 17884:2004 specifies functional, photometric and performance requirements for searchlights fitted to high‑speed craft (HSC) in accordance with the IMO High‑Speed Craft (HSC) Code. The standard covers design, operation, environmental resistance, tests for type approval and documentation required to ensure searchlights support safe navigation, collision avoidance and search‑and‑rescue operations at sea.

Key topics and technical requirements

• Scope & purpose: Searchlights for detection of vessels, obstructions, floating objects, sea marks and persons in the water on HSC.
• Remote control & availability: Pan/tilt remote operation (electrical, hydraulic or pneumatic) from the conning position; status indications for stand‑by, on and fault.
• Photometric performance:
  • A specified minimum luminous intensity is required (document gives “2 × 10 cd” - see the published standard for exact notation). This is stated to correspond to 5.6 lx at 600 m with atmospheric transmission 0.8.
  • Beam shape limits: half‑peak divergence (αh) normally between 3° and 8° (may be