Gyeokryeolbiyeoldo
Gyeokryeolbiyeoldo
The westernmost archipelago of Chungnam and a baseline point of the territorial sea (Dong·Seo·Buk-Gyeokryeolbido and attached islets). Entirely rocky cliff, it is an undeveloped offshore uninhabited island with no docking facilities or scheduled ferry, reachable only by charter boat from Anheung Port. West Sea diving media feature it as a signature dive site of the Seosan·Taean region.
Chungnam's westernmost
undeveloped offshore archipelago
The westernmost archipelago of Taean, Chungnam, and a baseline point of the territorial sea (Dong·Seo·Buk-Gyeokryeolbido and attached islets). A Cretaceous volcanic island formed about 70 million years ago, it is entirely rocky cliff and an undeveloped offshore uninhabited island with no docking facilities or scheduled ferry (only Buk-Gyeokryeolbido houses lighthouse staff). The surrounding waters are clean seas rich in fish stocks.
Gyeokryeolbiyeoldo by field data
* Depth, visibility, water temperature and underwater terrain all lack a primary dive source (data pending). The 'strong' current rating is based on general West Sea characteristics, so safe diving is recommended only around slack tide.
Key species info to be confirmed
A primary source for signature species per site has not been secured (data pending). The surrounding waters are known as clean seas rich in fish stocks.
From Seoul to the entry point
Anheung Port, Geunheung-myeon.
No scheduled ferry · charter boat.
About 55 km offshore by boat.
Whether an entry-permit system exists is unconfirmed (permits null). To avoid friction with fishermen and the coast guard, legal diving through a resort or dive shop is recommended, and Gyeokryeolbiyeoldo's own entry procedure needs to be confirmed.
Nearest-chamber information has not been secured. In an emergency, prioritize the 119 / DAN hotline.
- Strong current (dive only around slack tide)
- Low visibility possible
- Remote offshore (delayed access and rescue)
- Possible friction with fishermen / coast guard (legal entry required)
- Depth, visibility, underwater terrain and per-site species all lack a primary dive source — only coordinates, administrative area and key landforms are cross-verified.
- The 'strong' current rating is based on general West Sea characteristics (not a site measurement) — dive only around slack tide as a rule. Entry procedure to be confirmed.
Chungnam's westernmost
offshore uninhabited island
Plan your dive at Gyeokryeolbiyeoldo.