What the Port / Starboard Navigation Lights symbol means
Red port and green starboard sidelights help other vessels determine aspect and relative movement at night/restricted visibility.
Where you may see this symbol
This entry belongs to the Marine section and is grouped under Navigation. It is commonly encountered at Bridge light panel / vessel exterior. Depending on the vehicle, vessel or machine, it may appear as a lamp, display message, annunciator or control-panel symbol.
How this symbol usually looks
Additional masthead, stern, towing and special-status lights may be required.
Common versions you may see
The examples below show a few realistic ways this symbol may appear. Exact geometry, wording, framing and flashing behaviour can vary by manufacturer and system design.
Combined sidelights
Combined port (red) and starboard (green) navigation-light presentation.
Port only
Port side shown in red.
Starboard only
Starboard side shown in green.
Detailed explanation and operating context
Port / Starboard Navigation Lights is indexed on SymbolDeck so users can find it by a specific symbol name or by plain-language searches such as “what does this warning light mean?” The page is designed to help with fast visual identification while still giving enough context to understand the system behind the symbol.
Status is SymbolDeck’s general-reference urgency classification for this entry. Real-world urgency can change with operating state, multiple simultaneous warnings, environmental conditions and manufacturer logic. Approved documentation should always take precedence.
Safety note
For safety-critical road, aviation, marine, rail or machinery operation, this page is for identification and learning only. Approved manuals, checklists, rulebooks, placards and qualified personnel take precedence.
