Dive Site: C-58 Wreck

About C-58 Wreck

The C-58 Wreck is a prominent artificial reef located in Bahía de Mujeres, the channel between Isla Mujeres and the Cancún coast. Originally the USS Harlequin, a 56-meter (184 ft) US Navy minesweeper, it was intentionally sunk in 2000 by the Mexican government to create a new habitat for marine life and a destination for divers. It lies on the seabed at a maximum depth of 26 meters (85 ft). Hurricane Wilma significantly altered the wreck in 2005, breaking it into two distinct sections: the bow and the stern. This structural change created large openings, allowing divers to penetrate sections like the cargo hold and explore along the deck. The stern offers extensive penetration opportunities, including several rooms and even a former bathroom, while the bow, about 100 meters (300 ft) away, rests on its left side. Over the years, the C-58 has become heavily encrusted with corals and sponges. This rich growth attracts a variety of marine species, transforming the metal structure into a thriving underwater ecosystem. Large black groupers are commonly seen patrolling the broken sections, alongside schooling jacks and barracudas. Seasonal visitors include eagle rays and nurse sharks. This dive is considered advanced due to its depth and the potential for strong currents, particularly in the channel. Visibility typically ranges from 10 to 25 meters (33 to 80 ft), though it can be reduced at times. Divers can anticipate a challenging yet rewarding experience exploring a significant piece of naval history that has been reclaimed by the ocean.

Dive site facts: C-58 Wreck

Depth

18–26 m

Current

Moderate to strong

Visibility

10–25 m

Water temperature

24–29 °C

Entry

Boat / negative entry

Level

Advanced

Dive type

Wreck, drift, big animals

Region / port

Isla Mujeres, Mexico

Coordinates

21.7485° N, 97.1483° W

Conditions & Currents

The C-58 Wreck is situated in a channel where currents can range from moderate to strong, often resulting in a drift dive. These currents are a significant factor in the return of eagle rays to the area, particularly from December to March. Divers should be prepared for varying current strengths, which necessitates good buoyancy control and comfort in moving water. Entry is typically a negative entry, requiring divers to descend quickly to the wreck. Exiting the dive often involves surfacing with a delayed SMB. Surge can occasionally affect the wreck, especially in shallower sections. Visibility is generally good, between 10 to 25 meters, but strong currents can sometimes stir up sediment, reducing clarity. This environment demands an advanced certification level and experience with currents, making careful gas planning essential.

Marine life & sighting chances

Black grouper

common

Great barracuda

common

Schooling jacks

common

Nurse shark

occasional

Hawksbill turtle

occasional

Spotted eagle ray

December to March · common

Moray eel

occasional

Amberjack

occasional

Horse-eye jack

occasional

Pompano

occasional

Dive profile & how the dive runs

Dives on the C-58 Wreck typically involve a negative entry due to potentially strong currents, with divers descending directly onto the stern section at approximately 26 meters. The dive usually begins by exploring the more intact stern, where penetration into the cargo hold and various rooms is possible for certified wreck divers. Schools of fish often inhabit these open sections. Divers then proceed down current, often drifting, towards the bow section which lies about 100 meters away and rests on its side. This smaller part offers limited penetration but is excellent for spotting marine life such as eagle rays. The turn point is determined by air consumption and the current strength, allowing sufficient time to explore both sections while managing bottom time. The ascent usually involves deploying a delayed surface marker buoy for a safety stop in the blue, or near shallower parts of the wreck if conditions allow, before surfacing in the open channel.

Underwater photography

The C-58 Wreck presents excellent opportunities for wide-angle photography, capturing the dramatic broken structure and the overall eerie atmosphere. A wide-angle lens is ideal for showcasing the immense size of the wreck sections and the extensive coral growth covering the surfaces. Strobes are essential to bring out the vibrant colors of the corals and sponges, especially at deeper depths where natural light is limited. Due to potentially strong currents, maintaining stable buoyancy is crucial to avoid disturbing sediment or colliding with the wreck. When photographing inside the wreck, consider the light and ethical guidelines for penetration, ensuring minimal impact on the environment and respect for marine life. Look for resident groupers and schooling fish against the backdrop of the metal structure, and be ready for encounters with passing pelagics like eagle rays.

Combine with nearby dive sites

• C-55 Wreck

  Sister ship of the C-58, sunk as an artificial reef near Isla Mujeres.

• MUSA Underwater Museum

  An artificial reef featuring over 500 sculptures, shallower and calmer.

• Manchones Reef

  Coral gardens paired with MUSA for a two-tank trip, shallow and mild currents.

• Ultrafreeze

  A deeper cargo ship wreck (61m long) also located off Isla Mujeres at 29 meters.

• Juan Escutia C-56

  Another wreck dive in the Cancún area.

Getting there & logistics

The C-58 Wreck is accessed via boat trips departing from Isla Mujeres or Cancún. Isla Mujeres is reached by a 20-minute Ultramar ferry from Puerto Juárez, near Cancún. Most dive operators launch from marinas in Cancún's Hotel Zone, reaching the wreck in about 10 to 30 minutes. Dive trips to the C-58 are typically part of a two-tank advanced dive package, often combined with a drift dive on a deep reef. Availability is generally daily upon request, with meeting times as early as 7:30 AM for morning departures. The duration of these trips is approximately 3.5 to 4 hours. Conservation and dock fees are typically included in the dive package price. Divers should ensure they have their Advanced Open Water certification and are comfortable with currents, with some operators recommending a minimum of 30 logged dives.

Safety & environment

For diving the C-58 Wreck, it is crucial to carry appropriate dive insurance that covers deep and wreck diving, as well as potential emergency evacuations. The nearest recompression chambers are located in Cancún. Given the strong currents and depth of 26 meters, divers must be Advanced Open Water certified and have solid experience with drift diving and managing air consumption in challenging conditions. Adherence to no-decompression limits is vital, and thorough dive planning, including gas management, is paramount. Always dive with a reputable operator who prioritizes safety and provides a professional guide. Carrying a delayed surface marker buoy (DSMB) is essential for signaling the boat during ascents, particularly in strong currents or when surfacing away from the wreck.

Who it suits — and who it doesn't

FAQ

C-58 Wreck FAQ

Liveaboards diving C-58 Wreck

These liveaboards may visit C-58 Wreck on selected itineraries — the exact dive sites depend on departure, weather and conditions.

Nautilus Explorer

Mexico

25 guests44.8 m

$336/day

Valentina

Mexico

20 guests38.1 m

$430/day

Rocio del Mar

Mexico

20 guests33.5 m

$392/day

Nautilus Under Sea

Mexico

19 guests32 m

$261/day

Nautilus Belle Amie

Mexico

32 guests44.8 m

$323/day

Quino del Mar

Mexico

20 guests36 m

$377/day

Nautilus Gallant Lady

Mexico

12 guests35.36 m

$332/day