Navigation Lights

The lights every type of vessel must display at night under Rules 20–31 — explore each from every bearing, by night and by day.

Tap a vessel to explore its navigation lights from every bearing — head-on, starboard, stern and port.

Power-Driven Vessels

Power vesselMore than 50 m

Power vesselLess than 50 m

Power vesselLess than 12 m

Power vesselLess than 7 m, max speed 7 knots

HovercraftNon-displacement mode

Sailing Vessels

Sailing vesselUnder sail (with optional red over green)

Sailing vesselLess than 20 m — combined tricolour lantern

Sailing vesselLess than 7 m — torch or lantern

Pilot Vessels

Pilot vesselOn pilotage duty, underway

Fishing Vessels

Fishing vesselOther than trawling, making way

TrawlerMaking way

Not Under Command

Not under commandMaking way

Restricted Manoeuvrability

Restricted in ability to manoeuvreMaking way

Underwater operationsRAM — dredging / underwater ops, obstruction to starboard

Mine clearanceRule 27 (f)

Constrained by her draughtMore than 50 m

Towing & Pushing

Towing vesselunder 50 m, tow under 200 m

Towing vesselunder 50 m, tow over 200 m

Towing vesselover 50 m, tow under 200 m

Towing vesselover 50 m, tow over 200 m

Vessel being towedTow length under 200 m

Vessel being towedTow length 200 m or more

Inconspicuous / partly submerged towObject or vessel being towed

At Anchor

Vessel at anchorMore than 100 m — deck working lights

Vessel at anchor50 to 100 m

Vessel at anchorLess than 50 m

Aground

Vessel agroundRule 30 (d)

In the Navitime app

This is just a fraction of what the app offers

Download Navitime free on iOS and Android for the full Advanced Navigation book collection, adaptive quizzes, flashcards, and mock exams — all fully offline.

Download on the App Store Get it on Google Play