Here is some essential sea exploration common sense you must know before searching for treasures in Jeju Island's natural ocean.

Highlight 1 | Globally certified safe submarine, Asia's largest sightseeing vessel
Highlight 2 | 40‑meter tiered descent, one‑stop panoramic view of diverse undersea landscapes

Seogwipo Submarine Schedule

 Daily Sessions: 9:20, 10:00, 10:40, 11:20, 12:00,  12:40, 13:20, 14:00, 14:40, 15:20, 16:00

Introduction to Jeju Seogwipo Submarine

Did you know there is weather in the ocean too, just like on land!

Much like thick fog obstructing the view of land scenery, when ocean visibility is poor, the sea hides its beautiful underwater ecosystem like a treasure, keeping it out of sight.

Will Jeju's ocean bring us the luck of finding treasure today? Let's set off on a journey now!

There are 4 factors that change underwater weather!

First. Various suspended particles such as soil and organic matter floating in the water

Second. Phytoplankton that make the water appear green or turquoise

Third. The angle and intensity of sunlight or artificial lighting in the water

Fourth. The decrease in light transmittance according to water depth

Submarine Sightseeing

The JIAH submarine we will board today is the world's first digital submarine. It can accommodate up to 67 passengers, measuring 22 metres in length, 4.6 metres in width, and 5.7 metres in height.

Because it operates on battery electric power for exploration, it causes no harm to the marine nature, allowing you to experience the submarine safely.

Jeju Island Submarine Depth

40m Seabed

Boarding the JIAN

Seabed 40 metres: Approximately equivalent to the height of a 14‑storey building above ground. Can you imagine it?

Under an environment of 5 atmospheres of pressure, ordinary people cannot go there unless they are specialized professional divers.

Boarding the JIAH: You can safely take on the challenge of the deep seabed!

Be sure to check the digital depth gauge that indicates the water depth!

Upon reaching a depth of 40m, accompanied by the clear underwater weather as the mist disperses, you will have the luck of closely discovering the shining treasure ship in the waters off Munseom Island.

The Seogwipo Submarine was artificially constructed after clearing harmful substances from a fishing vessel, with the aim of providing breeding grounds and shelters for marine friends, serving as an artificial reef and habitat.

Today, the shipwreck known as the treasure ship has become a home for various marine life such as fish, shellfish, and corals. In fact, the fish population has increased by 300%.

If you find the treasure ship,

Don't forget to take a lucky photo of a lifetime!

Seogwipo Submarine Visitor Guidelines

1. Pre‑departure Preparation (Arrive 30 minutes in advance)

Arrive at the Seogwipo Submarine Pier at least half an hour before your booked time slot. Make sure to bring your passport to fill in boarding information on‑site. The indoor waiting area offers plenty of seating, is air‑conditioned in summer, and provides a comfortable waiting environment.

2. Marine Shuttle Boat to Open Sea

Once it's time, follow the staff to the pier and first take a marine ferry to the deep‑sea submarine mooring point. The boat ride takes about ten minutes, allowing you to enjoy the coastal mountain scenery of Seogwipo along the way.

3. Free Family Photo Shoot Before Boarding Submarine

Before transferring boats, each family is arranged for two photo sessions: one free commemorative photo which can be collected by yourself after the trip; and another paid professionally edited photo. You can choose to buy if you like the advanced photo, with no forced consumption.

4. Boarding the Jiah Submarine for Deep‑Sea Sightseeing

Enter the submarine's inner cabin via the ladder, and staff will arrange for passengers in batches to sit in front of individual portholes. Above each viewing window is a real‑time screen broadcasting the entire process of the submarine submerging, surfacing, and diver interactions.

The submarine adopts a tiered, slow descent mode, pausing every dozen metres of descent for viewing. A real‑time pressure display is set beside the porthole to intuitively experience deep‑sea changes, while K‑pop music plays throughout the journey, making the sightseeing experience relaxing and carefree.

5. Surfacing and Return, Total Duration About One Hour

After sightseeing, the submarine rapidly surfaces and you take the ferry back to the shore pier along the same route. The entire round‑trip process takes close to an hour, guided throughout by professional crew members with safety guaranteed.

Seogwipo Submarine Safety Travel Tips

Official Safety Standards

If taking part in a Seogwipo Submarine experience once: Allow a minimum interval of 12 hours before boarding a flight.

If you are catching a flight back to Hong Kong the same night after the submarine experience with less than 12 hours left, it is definitely not recommended as it poses health risks.

Repeated diving on the same day or consecutive days of diving‑related activities: It is recommended to wait at least 18 hours before taking a flight.

Conservative Safety Advice

Do not arrange the submarine on the final day of your itinerary. Leave a full 24‑hour buffer to completely eliminate nitrogen from the body and completely avoid the risk of decompression sickness.

Extended Taboos: Within 12 hours after completing the submarine trip, also avoid hiking or driving up high mountains, as pressure changes can similarly induce discomfort.

Physical Limitations, Not Recommended for the Following Individuals

Individuals suffering from claustrophobia: The submarine is a confined space with narrow quarters, which can easily induce panic and breathing difficulties.

Pregnant women, individuals with heart disease, lung disease, or those who have recently undergone head or cardiovascular surgery are prohibited from boarding.

Individuals prone to severe seasickness: The shuttle boat ride takes over ten minutes and will sway when sea waves are high; motion sickness pills can be taken in advance.

Recent severe cold, nasal congestion, ear infection: Deep‑diving pressure will stimulate the eardrum, causing severe pain and hearing discomfort.

Seogwipo Submarine Important Notes

Weather Impact

Submarine sightseeing is highly dependent on sea weather. In case of severe weather such as strong winds, heavy rain, or typhoons, operations will be directly suspended. It is recommended to check the real‑time weather forecast before departure; light drizzle generally maintains normal operations.

Physical Sensation & Suitable Audience

The interior of the submarine is a confined space with relatively narrow quarters. Friends suffering from claustrophobia are not advised to experience it;

The project pace is gentle without violent shaking, making it suitable for junior high school students, children, and elderly people. No water sports foundation is required, and it is easy to accept for those experiencing underwater sightseeing for the first time.

Other Detail Reminders

Crowds are extremely large during peak season, so be sure to book your time slot in advance and do not take chances by walking in on‑site;

Presenting a passport is mandatory for boarding, and no boarding is allowed without documents;

There is no Chinese commentary inside the submarine; it is recommended to check travel guides in advance to understand the features of underwater attractions;

Seogwipo Submarine Transport Guide

Address Details: 707‑5 Seohong‑dong, Seogwipo‑si, Jeju Special Self‑Governing Province  对委县岂补劉丘 从刊玊从 从憙號 707‑5

Transport Guide:

From Jeju International Airport: Take Airport Limousine Bus No. 600 from the airport, get off at Seogwipo Pier and call to contact; or take Wide‑area Bus No. 100 to the Intercity Bus Terminal, transfer to a bus operating via Route 516 or the Western Tourism Route, get off at Seogwipo and call to contact