Dive Site: USS Merrimac Wreck

About USS Merrimac Wreck

The USS Merrimac, a former coal ship, holds a significant place in naval history as a blockship from the 1898 Spanish-American War. Deliberately sunk to obstruct the entrance to Santiago de Cuba Bay, this 98-meter long vessel now lies at depths ranging from 19 to 23 meters. Its mid-channel location within the bay means divers can experience moderate to strong currents, offering a dynamic dive for those with experience. The wreck is part of the "Underwater Archaeological Park Naval Battle of Santiago de Cuba," a designated National Monument, preserving the material evidence of the conflict alongside thriving marine ecosystems. Over a century underwater, the Merrimac has transformed into a vibrant artificial reef. Its iron structures, artillery sites, and propulsion system components are now intertwined with sessile fauna and marine flora, creating a unique symbiotic environment. This site not only provides an exceptional opportunity to explore a historical artifact but also to witness the natural process of reef formation and the diverse species that call it home. Despite its historical context, the Merrimac is now a living marine citadel, attracting both history enthusiasts and marine life observers. Diving the Merrimac is typically done from Punta Gorda, a short boat ride away. While initial visibility near the surface can be affected by boat traffic, it significantly improves as you descend past 5 meters, offering clear views of the wreck and its inhabitants. The site requires careful dive planning due to the currents, making it best suited for divers who are comfortable with such conditions. It's a privilege to explore this exceptional witness to a pivotal moment in universal history, now a treasure of underwater cultural heritage.

Dive site facts: USS Merrimac Wreck

Depth

19–23 m

Current

Moderate to strong

Visibility

10–15 m (below 5 m depth)

Water temperature

25–30 °C

Entry

Boat / negative entry

Level

Experienced divers

Dive type

Wreck, historical

Region / port

Santiago de Cuba

Coordinates

19.965, -75.855

Conditions & Currents

The USS Merrimac is situated mid-channel within the entrance to Santiago de Cuba Bay, which means it is regularly exposed to moderate to strong currents. These currents can fluctuate, requiring divers to be experienced and maintain good buoyancy control throughout the dive. Entry and exit strategies are typically managed by the dive boat, often involving a negative entry to reach the wreck quickly, minimizing surface drift in potentially busy waters. Visibility can be limited to 10-15 meters due to harbor boat traffic in the initial 5 meters of descent, but it generally clears up significantly below that depth, offering good views of the wreck. Divers should be prepared for varying current strengths and plan their gas consumption accordingly, as navigating against a strong current can deplete air faster. A dive briefing will emphasize current awareness and safe navigation around the wrec

Marine life & sighting chances

Moray eels

occasional

Snappers

occasional

Groupers

occasional

Barracudas

occasional

Nurse sharks

rare

Eagle rays

rare

Tarpons

rare

Sponges

common

Gorgonians

common

Coral species

common

Dive profile & how the dive runs

Diving the USS Merrimac typically begins with a short boat ride from Punta Gorda. Upon arrival at the dive site, a negative entry is often employed to quickly descend past the initial 5 meters, where visibility can be lower due to harbor activity. Divers will follow a descent line directly to the wreck, which rests at varying depths from 19 meters at the bow to 23 meters at the stern. The dive generally involves circumnavigating the 98-meter-long vessel, exploring its exterior features, including the intact structures and any remaining artillery. Due to potential currents, it is advisable to plan the dive to start against the current and drift back towards the boat, allowing for an easier return. Turnaround points are usually based on air consumption, with a planned safety stop at 5 meters. Ascent is made along the descent line or a dedicated safety stop line, maintaining awareness of boat traffic above.

Underwater photography

The USS Merrimac wreck offers excellent opportunities for underwater photography, particularly for wide-angle shots to capture the full scale of the 98-meter vessel and its historical context. Its designation as an archaeological park, coupled with the dense marine growth, creates compelling subjects. Given the potential for moderate to strong currents, stable buoyancy and positioning are crucial for sharp images; consider using strobes to bring out the vibrant colors of corals and fish that have colonized the wreck. Macro photography can also be rewarding, focusing on the smaller marine life, such as nudibranchs or crabs, that inhabit the wreck's nooks and crannies. Pay attention to the initial visibility issues in the top 5 meters due to boat traffic; plan your shots for deeper sections where the water clears. Be mindful of ethical photography practices, avoiding disturbance to marine life or historical artifacts.

Combine with nearby dive sites

• Las Coloradas

  A shallow reef site known for diverse marine life and mild currents.

• El Triton

  A shallow site rich in juvenile marine life, good for photography.

Getting there & logistics

Access to the USS Merrimac is primarily through dive operators based in Santiago de Cuba, with departures from Punta Gorda, just a 5-minute boat ride from the dive site. Most international flights arrive at José Martí International Airport (HAV) in Havana, requiring a connecting domestic flight or a longer overland journey to Santiago de Cuba. Alternatively, Antonio Maceo Airport (SCU) in Santiago de Cuba offers direct international connections from some Caribbean and Latin American cities. Diving the Merrimac is often part of a multi-day dive package focusing on the historical wrecks of the Santiago de Cuba region. There are no specific park fees mentioned for diving this site, but dive operator costs will include boat fees and guide services. Given the wreck's location and currents, it is best visited with an experienced local guide.

Safety & environment

Diving the USS Merrimac requires adherence to strict safety protocols due to the currents in the channel and its wreck diving nature. Divers must carry appropriate dive insurance that covers emergency medical treatment and evacuation, as recompression chambers in Cuba can be limited and evacuation to another country might be necessary in severe cases. The nearest recompression chamber is in Havana, several hours away, highlighting the importance of preventative safety. Site-specific hazards include strong currents, potential entanglement risks from loose lines or debris on the wreck, and limited visibility in the upper water column due to boat traffic. It is crucial to follow the dive guide's instructions, maintain excellent buoyancy, and avoid penetration of the wreck unless specifically trained and equipped for such dives. Always dive with a buddy and ensure all equipment is in good working order.

Who it suits — and who it doesn't

FAQ

USS Merrimac Wreck FAQ

Liveaboards diving USS Merrimac Wreck

These liveaboards may visit USS Merrimac Wreck on selected itineraries — the exact dive sites depend on departure, weather and conditions.

Jardines Avalon Fleet

Cuba

20 guests35.05 m

$494/day