IALA B
North + South America
Philippines
Japan
South Korea
IALA A
Rest of the world
Port Lateral
Can
Flashing anything but FL(2+1)
STBD Lateral
Cone
Flashing anything but FL(2+1)
Preferred channel port
Cone
FL(2+1)
Preferred channel STBD
Can
FL(2+1)
North Cardinal
2 black cones pointing up
Continuous flashing VQ or Q
East Cardinal
2 black cones pointing away
Flashing
VQ (3) 5s
Q (3) 10s
South Cardinal
2 black cones pointing down
Flashing
VQ (6) + LFL 10s
Q (6) + LFL 15s
West Cardinal
2 black cones pointing towards each other
Flashing
VQ (9) 10s
Q (9) 15s
Isolated Danger
2 black spheres
White Fl(2) (any period)
Safe Water
Single red sphere
Morse Alfa, Isophase, Occulting, LFl 10s
Pass it on your port side
Emergency Wreck
Standing yellow cross
Blue 1s + 0.5s + Yellow 1s + 0.5s
Multiple bouys - lights synchronised, Morse Delta (_..) RACON
Special Mark
Sideways cross
Yellow any rhythm that cannot be mistaken for a white light
Special Mark Indicates
C - Cables and pipelines
R - Recreational areas
O - ODAS buoy (Ocean data acquisition system)
F - Firing areas
T - TSS
S - Spoil grounds
Channel within a channel