Library

A — Alpha

Diver down; keep clear

B — Bravo

Dangerous cargo

C — Charlie

Affirmative / Yes

D — Delta

Keep clear; maneuvering

E — Echo

Altering course to starboard

F — Foxtrot

Disabled; communicate

G — Golf

I require a pilot

H — Hotel

Pilot on board

I — India

Altering course to port

J — Juliet

On fire; keep clear

K — Kilo

I wish to communicate

L — Lima

Stop instantly

M — Mike

Vessel stopped

N — November

Negative / No

O — Oscar

Man overboard

P — Papa

About to sail (Blue Peter)

Q — Quebec

Request pratique

R — Romeo

Received

S — Sierra

Engines astern

T — Tango

Keep clear of trawlers

U — Uniform

Heading into danger

V — Victor

Require assistance

W — Whiskey

Require medical assistance

X — X-ray

Stop your intention

Y — Yankee

Dragging anchor

Z — Zulu

I require a tug

Power-driven vessel underway

Masthead + sidelights + sternlight

Vessel at anchor

All-round white (one or two)

Sailing vessel underway

Sidelights + sternlight (no masthead)

Not under command

Two all-round red, vertical

Restricted in ability to maneuver

Red — White — Red, vertical

Vessel constrained by her draft

Three all-round red, vertical

Vessel aground

Anchor light(s) + two all-round red vertical

Fishing (not trawling)

Red over white, all-round

Trawling

Green over white, all-round

Pilot vessel on duty

White over red, all-round

Towing astern (tow ≤ 200 m)

Two masthead vertical + yellow towing light

Towing astern (tow > 200 m)

Three masthead vertical + yellow towing light