300-Series Port 200-002

Common issues

• LED module output degradation over time reducing luminous intensity below the COLREG-required range
• Lens fogging or UV yellowing reducing light transmission
• Seal/gasket degradation allowing water ingress into the housing
• Corrosion at the mounting base or cable gland, particularly on exposed deck locations
• Power supply/driver board failure causing intermittent or total light loss
• Physical damage to the lens from ice, green water, or deck-work handling

Inspection checklist

• Visual check that the light is burning correctly at each bridge watch/daily check
• Inspect the lens for cracking, fogging, or heavy fouling
• Check the housing and gland for water ingress or corrosion
• Verify mounting security and alignment (correct arc of visibility, no obstruction)
• Test light intensity/function via the navigation light monitoring system, where fitted
• Check the spare/backup lamp arrangement functions correctly, if a dual-lamp fitting
• Confirm cabling and connections are corrosion-free and properly sealed

Service intervals

Typical wear limits

Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.

Critical spares

• Complete LED lamp/lens module of matching type
• Housing gasket/seal kit
• Power supply/driver board, if a separate replaceable component
• Corrosion-resistant mounting bracket hardware

Safety

• Working aloft or on exposed mast/deck locations to service navigation lights requires fall protection
• A failed or dim navigation light is a collision-risk safety deficiency and should be rectified without delay
• Electrically isolate before servicing to avoid shock, even at the low DC voltage typical of LED navigation lights

Class survey

Class/flag surveys check that navigation lights meet COLREG Rule 22 visibility ranges and arcs, that any required navigation light monitoring/alarm system operates correctly, and that spare lamp arrangements, where required, are in place.