Diving atMarianna Shipwreck (Greece)
Descending onto the Marianna shipwreck, divers first encounter the prominent crane, which subtly breaches the surface. This serves as an immediate visual cue for the dive's orientation. Below, the wreck expands, presenting its broken structure. Divers explore its length, observing how the main section rests at a max depth of 23 m (75 ft), inviting exploration of its artificial reef features.
Tonight's objective overview for Marianna Shipwreck shows an air temperature of 15.9°C. The measured surface conditions include wave heights around 0.62m. This environmental data is logged for the close of the day.
Dive Site Coordinates
37.0462, 25.3167
Key Dive Site Facts
Dive Site Overview
The Marianna shipwreck, a former cargo vessel, now forms a substantial artificial reef between Naxos and Paros in the Aegean Sea. Built in 1961 as the 'Niels Maersk' and later renamed by Greek owners, the ship had a total capacity of 3,000 gross tons and an original length of 91 meters (299 ft) with a 15-meter width.
On July 24, 1981, carrying barley, water pipes, pesticides, and metal sheets, it crashed into the 'Amaras' reef. Remaining exposed for several months, experts later intentionally blew up sections of the ship. This action aimed to ensure safe passage for other vessels, resulting in its current fragmented state.
Today, a remaining 35-meter long and 15-meter wide section of the ship forms the core of the dive site, presenting a compelling structure for exploration. Many large and smaller parts lie scattered as ruins adjacent to the main wreckage, contributing to its diverse structure and providing varied habitats.
A forward section of the vessel rests slightly deeper, around 24 meters, while the prominent crane remains just half a meter above the water's surface, offering an easily identifiable landmark for surface vessels and divers alike.
Best Time to Dive
Considering the long favorable dive season, contrasting conditions between summer and winter are notable. The period from March through December consistently registers good dive scores, with the warmest and calmest conditions typically found from May to September. During these months, average air temperatures range between 19.7°C (67.5°F) in May and 27.6°C (81.7°F) in July, paired with minimal rainfall, often less than 0.8 mm (0.03 in). Wave heights remain at their lowest during this period, averaging around 0.6-0.7 meters (2-2.3 ft), and wind speeds are generally reduced. Conversely, winter months, particularly January and February, see air temperatures drop to around 13.4-14.1°C (56-57°F), with increased rainfall and higher wave activity, although dive scores remain 'Good.' The reported average water temperature of 21°C (70°F) suggests comfortable diving across much of the extended season, though it may cool in winter.
Climate Historical Averages
Monthly records compiled from satellite and marine observation nodes over the last 3 years. Data provided by Open-Meteo and MET Norway.
Dive Experience & Conditions
Consistently favorable conditions characterize the dive experience at this wreck, making it accessible for certified divers within recreational depth limits. Upon descending, divers encounter the main structure reaching a maximum depth of 23 meters. A forward piece lies slightly deeper, around 24 meters, extending the available depth profile. Divers typically enjoy a bottom time of up to 40 minutes here, allowing ample opportunity for observation of the wreck's features and marine inhabitants. Water visibility is consistently good, averaging around 20 meters, enhancing the exploration. The average water temperature hovers around 21°C (70°F), offering comfortable conditions for most of the year. Prior dive experience for this site recommends an Open Water Diver certification supplemented by at least 20 logged dives, ensuring divers possess the necessary confidence and skill for wreck navigation.
Dive Difficulty & Safety Guidelines
When planning a dive to the Marianna shipwreck, divers should always consult local dive professionals for current site conditions. While no unique hazards are consistently reported, standard safe diving practices are paramount. Due to ongoing health considerations, bringing personal equipment such as a mask, snorkel, and regulator mouthpiece is suggested. If using rental gear, dive operators implement strict disinfection protocols for regulators, alternate second stages, snorkels, masks, and BCD oral inflators. This involves submerging equipment in a 10% bleach solution or using other approved cleaning products, followed by a fresh water rinse. Adhering to these guidelines ensures a safer and more hygienic dive experience.
Recommended Equipment
No verified equipment items yet.
Verified equipment recommendations for this dive site are being reviewed and may be added as additional source checks are completed.
Recommended Dive Suit
In conditions like these, many divers prefer diving with 5-7mm wetsuit. Consider warmer surface protection (like a boat coat) due to brisk winds. A thermal robe or jacket is recommended between dives.
Current readings at Marianna Shipwreck show water temperatures near 17°C (62°F). Surface air temperatures are resting at 16°C (61°F).
Forecast models indicate that diving conditions should remain largely unchanged.
Conditions last reviewed: 18:00 using the latest environmental data.
Dive Logistics & Preparation
Hyperbaric Chamber
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Entry Requirements
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Currency
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Marine Life at Marianna Shipwreck
As divers approach the Marianna, one of the first things noticed is the transformation of the vessel into an artificial reef. The fragmented structure and numerous smaller parts scattered around the main wreck provide abundant shelter. A variety of fish species have established homes within these crevices and open spaces. It's common to observe smaller schooling fish darting among the metal structures, alongside other resident marine organisms that benefit from the protected environment the wreck creates.
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Frequently Asked Questions
What is the maximum depth of the Marianna shipwreck?
The main section of the Marianna shipwreck reaches its maximum recreational depth. A forward piece lies slightly deeper, expanding the overall depth profile of the wreck.
What type of ship was the Marianna?
The Marianna was a cargo ship, originally built in 1961. It transported various goods, including barley, water supply pipes, pesticides, and stainless metal sheets at the time of its sinking.
What dive experience level is recommended for the Marianna shipwreck?
Divers should hold an Open Water Diver certification and have at least 20 logged dives. This ensures familiarity and comfort in navigating a wreck environment.
What are the typical water conditions at the site?
The average water temperature at the Marianna shipwreck is around 21°C (70°F). Visibility typically extends to about 20 m (65 ft), offering clear views of the wreck and marine life.
When is the best time to dive the Marianna shipwreck?
The best time to dive is generally from May to September for the warmest air temperatures, minimal rainfall, and calmer seas. However, the dive season extends from March through December with good conditions.
How much of the original ship remains visible?
After being intentionally blown up, a significant portion remains. The most intact section measures 35 meters long and 15 meters wide. Notably, the ship's crane is still visible, rising half a meter above the water's surface.
Are there any specific equipment recommendations for diving the Marianna?
Yes, divers are advised to bring their own mask, snorkel, and regulator mouthpiece. This recommendation is primarily for hygiene purposes, especially when using rental equipment.
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