Batu Bolong (Komodo) — Indonesia

The Pinnacle Structure

Batu Bolong is a massive rock formation. It sits in the Linta Strait between Komodo and Tatawa islands. The structure rises from the seabed toward the surface. Most divers stay between 15 m and 30 m. However, the base drops to 70 m.

It is a vertical wall. You will see corals growing on every angle. This site works as a feeding station for large predators. I remember diving here in 2018 during a heavy surge. The water moved with incredible force.

What you’ll see

Fish density is very high here. You can expect to see large schools of barracuda. They often hang in the current above the reef. I saw a school of 50+ fish in 2019.

Reef-shark sightings are common near the edges. These sharks patrol the deeper sections of the wall. You might also spot a turtle resting on the ledge. The visibility usually stays between 20 m and 30 m. This clarity helps you see the predators coming from a distance.

Large pelagics often pass through the strait. They use the current to conserve energy while hunting. It is a busy place. You must watch your depth closely because the topography changes quickly.

Conditions and skill

This site is for advanced divers only. You need strong buoyancy skills. The currents in the Linta Strait are often extreme. Most boats only dive during the slack water window. This window lasts about 15 to 20 minutes.

You must carry a reef hook. It is not optional at Batu Bolong. You use it to stay stationary on the rock. Without it, you will drift away from the pinnacle. You also need a large SMB. Visibility can drop if silt gets stirred up.

Do not attempt this without 50 logged dives. The surge can be unpredictable. It can push you into the coral easily. Stay close to your buddy at all times.

Logistics from Komodo

Most divers stay in Labuan Bajo. You will take a boat from the main harbor. A typical day trip takes 3 to 4 hours of boat travel. Prices for a single dive usually cost $50 to $70 USD.

Liveaboards offer better access to these sites. They can arrive at Batu Bolong exactly at slack tide. This timing is critical for safety. If you stay on land, check the tide charts carefully. Many local operators follow a strict schedule based on the moon phases.

When to go

The best months are March through October. The water temperature stays around 27°C to 29°C. I prefer diving in May or June. The currents are manageable during these months.

Rainy seasons can affect visibility. Heavy rain in January often brings more sediment into the water. This makes the 20 m visibility drop even lower. Aim for the dry season for the best experience.

Honest negatives

The crowds can be a problem. Many boats arrive at the same time. You might find yourself sharing the pinnacle with 15 other divers. This makes it hard to see the reef-shark without interference.

The current is exhausting. You will use more air than usual here. I often see divers run out of air at 25 m because they fight the flow. It is a physically demanding dive. If you are tired, do not push your limits.

Wait for a liveaboard if you want more privacy. They can reach the site earlier than day boats. This helps you avoid the midday rush. Check your logbook before booking this specific site. If you have never dived current, start at Crystal Bay before Manta Point.