US4629325

Hold

Tools

A patent covering the Moire-based ship guidance light system.

Why it's here

Placed in Hold: 1 article(s) of evidence from 1 source(s), led by research-stage coverage, with 0 in the last 30 days. Confidence 24%. Low accumulated evidence, so it defaults conservatively pending more signal.

Evidence (1)

2Hacker News·8/16/2026research
Moire Pattern Signaling for Guiding Ships
A maker recreated a patented Moire-pattern navigation light system designed to guide ships along narrow channels or mark hazards such as submarine cables. The post compares it with a simpler three-light scheme and argues the Moire approach is best suited to marking very narrow paths rather than broad safe corridors.