The International Maritime Buoyage System by the International Association of Marine Aids to Navigation and Lighthouse Authorities (IALA) is classified into region A and region B. Korea, Japan, Taiwan, the Philippines, and North?South America follow the system for region B while other countries follow region A.

Types, meanings, color, shape, and signal type for IALA maritime buoy methods (region B)

Types, meanings, color, shape, and signal type for IALA maritime buoy methods (region B)
Type of aid Meaning
of aid
Color Summit shape Color by signal Signal type
Color Shape Color Signal method
Flank aid Port side aid 1. The aid is located on the far left of the route.
2. There are navigable waters to the right side of the aid.
3. There are obstacles such as rocks, reefs, sunken vessels etc. to the left of the aid.
Green Green 1 Cylindrical structure Light buoy:
signal

Buoy:
signal

Light beacon:
signal

Beacon sign:
signal
Green signal
Starboard side aid 1. The aid is located on the far right of the route.
2. There are navigable waters to the left side of the aid.
3. There are obstacles such as rocks, reefs, sunken vessels etc. to the right of the aid.
Red Red 1 Conical structure Light buoy:
signal

Buoy:
signal

Light beacon:
signal

Beacon sign:
signal
Red
Port side priority channel aid There is a priority route to the left of the aid. 1 green horizontal line on red background Red 1 Conical structure Light buoy:
signal

Buoy:
signal

Light beacon:
signal

Beacon sign:
signal
Red signal
Starboard side priority channel aid There is a priority route to the right of the aid. 1 red horizontal line on green background Green 1 Cylindrical structure Light buoy:
signal

Buoy:
signal

Light beacon:
signal

Beacon sign:
signal
Green
Bearing aid North cardinal aid 1. There are navigable waters to the north of the aid.
2. There are obstacles such as rocks, reefs, sunken vessels etc. to the south of the aid.
3. Entry/exit·curve point·intersection or junction for the route is to the north of the aid.
Upper section black, lower section yellow Black 2 Conical bell-type structures (tip of the bell facing upwards) Light buoy:
signal

Buoy:
signal

Light beacon:
signal

Beacon sign:
signal
White signal
East cardinal aid 1. There are navigable waters to the east of the aid.
2. There are obstacles such as rocks, reefs, sunken vessels etc. to the west of the aid.
3. Entry/exit·curve point·intersection or junction for the route is to the east of the aid.
1 yellow horizontal line on black background Black 2 Conical bell-type structures (tip of the bell facing downwards) Light buoy:
signal

Buoy:
signal

Light beacon:
signal

Beacon sign:
signal
White signal
South cardinal aid 1. There are navigable waters to the south of the aid.
2. There are obstacles such as rocks, reefs, sunken vessels etc. to the north of the aid.
3. Entry/exit·curve point·intersection or junction for the route is to the south of the aid.
Upper section yellow, lower section black Black 2 Conical bell-type structures (tip of the bell facing downwards) Light buoy:
signal

Buoy:
signal

Light beacon:
signal

Beacon sign:
signal
White signal
West cardinal aid 1. There are navigable waters to the west of the aid.
2. There are obstacles such as rocks, reefs, sunken vessels etc. to the east of the aid.
3. Entry/exit·curve point·intersection or junction for the route is to the west of the aid.
1 black horizontal line on yellow background Black 2 Conical bell-type structures (tip of the bell facing upwards) Light buoy:
signal

Buoy:
signal

Light beacon:
signal

Beacon sign:
signal
White signal
Isolated danger aid There are isolated obstacles such as rocks, reefs, sunken vessels etc. at or near the aid. 1 red horizontal line on black background Black 2 Conical bell structures Light buoy:
signal

Buoy:
signal

Light beacon:
signal

Beacon sign:
signal
White signal
Safe waters aid 1. There are navigable waters near the aid.
2. The aid is located at the center of navigable waters.
1 red/white vertical line Red 1 Circular structure Light buoy:
signal

Buoy:
signal
White signal
Special purpose aid 1. The waters surrounding the aid are located near the border of special zones such as construction sites.
2. There are special purpose facilities located near or at the aid.
Yellow Yellow 1 X-type
structure
Light buoy:
signal

Buoy:
signal

Light beacon:
signal

Beacon sign:
signal
Yellow signal
New hazardous material aid Indicates the location of new hazardous obstacles such as sunken vessels when they occur. Blue/yellow vertical lines Yellow + type signal Blueㆍyellow
arc light
signal
Light vessel Generally placed in critical waters with heavy traffic to serve as landfall markers. Red - - signal Select appropriately -
signal

Coastal Passenger Ferry

Coastal Passenger Ferry
Route Ship Name Total Tonnage Passenger Cap.(Person) Passenger Transportation during 2013(Person)
 Gunsan-Piando  Okdo Ferry 169 253 145,708
Jindalrae 52 90
 Gunsan-Maldo  Jangja Ferry 124 166 25,091
 Gunsan-Keyado  Keya Ferry 104 92 19,131
 Gunsan-Eochungdo  New Eochung Ferry 121 140 22,958
 Yido-Kyokpo  Daewon Car Ferry 350 322 202,973
Pajanggeum Car Ferry 350 322
 Total Sum   1,270 1,385 415,861