Hongdo (Tongyeong)
Hongdo (Tongyeong)
Tongyeong's outermost uninhabited island and a baseline point of the territorial sea, about 50.5 km from Tongyeong Port by boat (roughly 1 hour 30 minutes by sea). As Natural Monument No. 335 and a black-tailed gull breeding ground, landing on the island is restricted, so diving is done as boat diving in the surrounding waters.
An offshore island
you can't set foot on
An uninhabited island in Maejuk-ri, Hansan-myeon, Tongyeong, Gyeongnam. As Tongyeong's outermost territorial-sea baseline point, it lies about 50.5 km from Tongyeong Port, roughly 1 hour 30 minutes by sea. As Natural Monument No. 335, a black-tailed gull breeding ground and a designated island, landing is restricted, so only boat diving in the surrounding waters is possible. The island is ringed by sheer rock cliffs.
Hongdo (Tongyeong) by the field data
※ Depth, visibility, water temperature, current and best season are all unrecorded or single-aggregate (original source unread) — data pending — and are not year-round representative values.
Underwater life data needs verification
The primary source for underwater life has not been secured (data pending). The island's Natural Monument black-tailed gull is a bird, not a target of dive observation.
From Seoul to the entry point
To Tongyeong by KTX/bus.
About 50.5 km by boat · no scheduled ferry.
Landing restricted · boat diving.
As a black-tailed gull breeding ground and a designated island, landing is restricted. Diving is done only as boat diving in the surrounding waters, and even then you must check the relevant rules and permits.
Nearest-chamber information has not been secured. In an emergency, call 119 / the DAN hotline first.
- Currents strong enough to overpower you
- Open sea & long distance (emergency evacuation time)
- Vessel traffic
- Depth, visibility, water temperature, current and best season are all unrecorded or single-aggregate (original source unread) — data pending.
- The advanced rating is an estimate based on reports of an offshore uninhabited island and strong currents. Confirm permits and rules for diving in the surrounding waters with local shops / Tongyeong City / the Korea Heritage Service.
Tongyeong's offshore
uninhabited island, Hongdo
Plan your dive at Hongdo.