A shipwreck found off the north coast of Haiti could be the 500-year-old remains of the Santa Maria, which led Christopher Columbus's famed voyage to the New World, according to a team of marine explorers.

"All the geographical, underwater topography and archaeological evidence strongly suggests that this wreck is Columbus' famous flagship, the Santa Maria," Massachusetts marine investigator Barry Clifford said in a press release on Tuesday.

"I am confident that a full excavation of the wreck will yield the first-ever detailed marine archaeological evidence of Columbus' discovery of America," he added.

Clifford, who led a reconnaissance expedition to the site, will hold a press conference Wednesday morning at the Explorer's Club in New York City to announce the discovery.

The Santa Maria was one of a fleet of three vessels that departed Spain in 1492 looking for a shorter route to Asia. The ship, after arriving near the Bahamas, drifted into a reef and had to be abandoned. Columbus ordered sailors to build a fort nearby before taking the remaining two ships back to Spain to report his findings.

Clifford and his team first discovered the wreck in 2003, but were unable to identify the ship. Yet the discovery of Columbus' encampment on nearby Haiti and data from the explorer's diary appear to prove the heavily decayed vessel on the sea floor was the Santa Maria.

NOAA has determined the probable location of the remains of the Civil War-era sidewheel steamer Planter, which gained national fame in 1862 when a group of enslaved African Americans commandeered the Confederate Navy transport ship in a daring escape to freedom.

The announcement was made in Charleston, South Carolina, where NOAA’s Office of National Marine Sanctuaries released a report on its search for the Planter and plans for an interpretative sign and future exhibit dedicated to the Planter’s legacy. The effort to find the Planter supports NOAA’s Voyage to Discovery initiative, which seeks to highlight African-American maritime history through education, archaeology, science and underwater exploration.

Under the leadership of Robert Smalls, the ship’s steersman, crew members navigated the steamer out of Charleston Harbor on May 12, 1862, and delivered the vessel to the United States Navy. The New York Herald called the escape “one of the most daring and heroic adventures since the war was commenced.”

The notoriety generated by the escape and capture of the Planter led to Smalls eventually becoming the first African-American master in the U.S. Navy and a member of Congress representing South Carolina – the state where he was born a slave. NOAA’s report helps fill gaps in the largely untold story of Robert Smalls and the Planter, which wrecked on a beach in March 1876 while trying to tow a grounded schooner.

In an attempt to answer lingering questions about the Planter’s fate, NOAA researchers reviewed historical documents and analyzed oceanographic and meteorological conditions that may have existed at the time of the Planter’s loss. The likely site where the vessel came to rest, off Cape Romain between Charleston and Georgetown, South Carolina, was confirmed with magnetometer and hydro-probing surveys that detected the presence of large concentrations of iron consistent with the remains of a sunken ship. The vessel’s remains are buried under 10-15 feet of sand and water in an environmentally sensitive area.

“Our interest in finding the Planter is about more than just unlocking the past and secrets of the deep,” said Daniel J. Basta, NOAA’s Office of National Marine Sanctuaries director. “This expedition is an opportunity to highlight African-American contributions to the country’s maritime heritage and inspire young people to consider careers in marine science to help expand the boundaries of ocean exploration.”

Following Smalls’ commandeering of the Planter on May 12, 1862, the ship continued to be used by the U.S. Navy as a dispatch and supply vessel with Smalls as pilot. However, by September of that year, the Navy transferred the craft to the U.S. Army Quartermaster Corps, where it supported Army operations around Charleston, Port Royal and Beaufort.

News accounts suggest that after the war, Smalls and the Planter were well known among local African Americans. As the Planter’s captain, he transported many freed slaves to newly created farmsteads and communities at Hilton Head and Port Royal. With Smalls at the helm, the Planter was reported as the ship that carried black dignitaries and passengers to the ceremony of the symbolic raising of the Fort Sumter flag which had been lowered after the fort’s capture by the Confederates.

On March 25, 1876, while trying to tow a grounded schooner, Planter sprang a plank in the bow and began to take on water in the hold. The captain elected to beach the steamer and repair the plank, hoping to get off the beach with the next high tide. However, stormy seas battered the Planter as the tide rose and the ship was too badly damaged and had to be abandoned. Upon hearing of its loss, Robert Smalls was reported to have said that he felt as if he had lost a member of his family.

Academics at the University of Sheffield have dispelled a long-held theory that the Titanic was unlucky for sailing in a year with an exceptional number of icebergs and say the risk of icebergs is actually higher now.

Previously it had been suggested that the seas which sank the famous cruise ship – which set off on its maiden voyage 102 years ago today (Thursday 10 April 2014) – had an exceptional number of icebergs caused by lunar or solar effects.

But academics at the University have shown the ship wasn’t as unlucky as previously thought.

Using data on iceberg locations dating back to 1913 – recorded to help prevent a repeat of the Titanic – they have shown that 1912 was a significant ice year but not extreme.

Professor Grant Bigg who led the research, said: “We have seen that 1912 was a year of raised iceberg hazard, but not exceptionally so in the long term. 1909 recorded a slightly higher number of icebergs and more recently the risk has been much greater – between 1991 and 2000 eight of the ten years recorded more than 700 icebergs and five exceeded the 1912 total.”

He added: “As use of the Arctic, in particular, increases in the future with the declining sea-ice the ice hazard will increase in water not previously used for shipping. As polar ice sheets are increasingly losing mass as well, the iceberg risk is likely to increase in the future, rather than decline.”

The iceberg which sank the Titanic was spotted just before midnight on 14 April 1912 500m away. Despite quick action to slow the ship it wasn’t enough and the ship sank in just two and a half hours. The disaster saw 1,517 people perish and only 700 survive.

Funding for the research, published in the journal Weather, was provided by the National Environment Research Council (NERC).

A deep-ocean exploration company in Florida says it has recovered nearly 1,000 ounces of gold, worth $1.3 million at current gold prices, on a reconnaissance dive to an historic Atlantic Ocean shipwreck.

The dive confirmed that the ship had not been disturbed since 1991 when another company stopped recovery work, Tampa-based Odyssey Marine Exploration, announced on Monday. The ship's sinking in 1857 with 21 tons of gold aboard in a hurricane off the coast of South Carolina sparked a U.S. banking panic.

Recovered gold included five gold ingots and two $20 Double Eagle coins, an 1857 coin minted in San Francisco and an 1850 coin minted in Philadelphia. The gold ingots were stamped with the manufacturer's "assay-mark" and weigh from 96.5 to 313.5 troy ounces.

U.S. $20 Double Eagle coins fetch an average of $5,000 from collectors, Odyssey's chief operating officer Mark Gordon told Reuters last week.

In March, Odyssey won the rights to return to the shipwreck from a receiver who had been appointed by an Ohio court to represent the ship's first exploration company after a decades-long court battle over rights to the treasure and return for investors

More than $40 million in gold was recovered by the original team led by Tommy Thompson, an Ohio engineer who discovered the shipwreck in 1988 using sonar and robotic technology he developed. The recovery efforts were derailed by lawsuits and investors accused him of failing to pay them. He has been considered a fugitive since 2012 when he failed to appear in court for a hearing.

Only about 5 percent of the shipwreck site was explored in the late 1980s, Gordon said.

The two-hour reconnaissance dive in mid-April took place as the company's research vessel, Odyssey Explorer, was traveling from the U.K. to Charleston, the company revealed on Monday.

Odyssey Explorer left Charleston recently to begin the bulk of recovery work at the shipwreck 160 miles off the South Carolina coast and 7,500 feet (2.2 kilometers) deep.

The 280-foot (85 meters) sidewheel steamship carried as much as 21 tons of gold ingots, freshly minted gold coins and raw gold from the California mines, as well as the personal wealth and belongings of its 477 passengers, most of whom were lost when the ship sank.

Historians say the loss of the gold caused a banking panic that contributed to a larger U.S. economic crisis, called the Panic of 1857, that lasted several years.