OutrunMarine
Search

Lights & Shapes

Power-driven vessel underway, under 50 m

Technical visualPower-driven vessel underway, under 50 m
Power-driven vessel underway, under 50 mA power-driven vessel under 50 m shows one white masthead light, red and green sidelights, and a white sternlight.mastheadport sidelightstarboard sidelightsternlight
Power-driven vessel underway, under 50 mA power-driven vessel under 50 m shows one white masthead light, red and green sidelights, and a white sternlight.12341masthead2port sidelight3starboard sidelight4sternlight

Power-driven vessel underway · under 50 m

Rule 23 display for a power-driven vessel underway under 50 m.

Lights

one white masthead light

red and green sidelights

white sternlight

Viewing aspect

Ahead: masthead plus one or both sidelights depending angle.
Astern: sternlight.
Abeam: appropriate sidelight plus masthead light.

Means

Power-driven vessel underway.

Nuance

A second masthead light is optional for many vessels under 50 m.

All Learn references