Argentina's Navy has detected seven brief satellite calls that officials believe may have come from a missing submarine with 44 crew members on board.

Argentina's navy says it has lost contact with a submarine off the southern coast - but does not consider it lost.

Saudi Arabia's King Salman has removed a prominent prince who headed the National Guard, replaced the economy minister and announced the creation of a new anti-corruption committee.

The commander of the US Navy's 7th Fleet is to be removed after a series of warship accidents in the Pacific, two of them fatal, officials have confirmed.

Latest: A number of bodies have been found on a flooded US warship after 10 sailors went missing when it collided with an oil tanker in south-east Asian waters, the US Pacific Fleet said.

The captain of a US warship that lost seven sailors in a collision with a commercial container ship in June will be relieved of command and more than a dozen others face punishment.

A US destroyer has arrived back in its home port after colliding with a container ship four times its size, leaving seven sailors missing.

US Secretary of State Rex Tillerson has said that China has threatened to impose sanctions on North Korea if it conducts further nuclear tests.

The senior US Navy officer overseeing military operations in the Pacific has said the crisis with North Korea is at the worst point he has ever seen.

Boris Johnson is to meet Donald Trump's national security adviser in Washington DC on Tuesday to attempt to draw a line under the diplomatic row sparked by claims Britain spied on the president, it is understood.

The inspirational Mark Pollock speaks to Irene Feighan and reveals how he aims to make Ireland the world’s leading research centre for robotics and spinal stimulation.

British Prime Minister Theresa May faces growing demands to give honest answers to British MPs in Parliament about a failed test of the Trident nuclear deterrent.

China has said it is closing off part of the South China Sea for military exercises this week.

Ingrid Carlberg’s meticulously crafted biography of Raoul Wallenberg recounts the story of a man who had a hand in the survival of most of the Jews in Budapest who lived through World War Two, writes Neil Robinson.

Irish and Argentina links run deep but when it comes to today’s big match, colours will be firmly nailed to masts, writes Billy Lynch

History will be made this morning when the Naval Service will for the first time aid in an overseas humanitarian mission.

A halo of hats, a swish of silk and a peek at a nicely turned ankle were among Edwardian wonders on show in Dublin yesterday.

So many rudderless English chariots have drifted away on the Liffey over the years they must now pose a danger to shipping in the Irish Sea.

On the 50th anniversary of the repatriation of Roger Casement’s remains, Ryle Dwyer contends that perfection is not a requirement of patriotism.

A cargo ship believed to be carrying hundreds of migrants has turned towards Italy, brushing off Greek authorities responding to a distress call from one of its passengers.

A cargo ship believed to be carrying hundreds of migrants has turned towards Italy, brushing off Greek authorities responding to a distress call from a passenger.

Prosecutors in Italy say they fear more bodies will be found aboard the crippled Greek ferry Norman Atlantic, adrift for a third day after a fire broke out on a car deck, with 10 people killed in the ensuing chaos.

Two crew members on an Albanian tugboat have died during the operation to secure the fire-hit Greek ferry from which hundreds of people were rescued and 10 people died, Albanian authorities said.

Rescue crews battled gale-force winds and massive waves as they struggled to rescue hundreds of people trapped on a burning ferry adrift between Italy and Albania.

Senior US officials found to have sanctioned the use of torture by the CIA should face the “gravest penalties”, the UN’s special rapporteur on human rights and counter-terrorism said.

Even when Kim Jong Un was nowhere to be seen, he was everywhere.

IF the neighbours weren’t used to it, they’d demand the destruction of my house. It is one of the ugliest buildings in the neighbourhood. In fact, it wins the prize for being ugly, leaky, and disfunctional.

The head of the US Coast Guard (USCG) has made a whistle-stop visit to Ireland amid tight security.

Commodore Mark Mellett is set to become the most senior Irish naval officer in the history of the State following his appointment as Deputy Chief of Staff (Support) of the Defence Forces.

All 18 sailors on a docked Indian navy submarine crippled by a pair of explosions are feared dead.

South Korea said there was “very high” probability that North Korea, engaged in weeks of threats of war, would launch a medium-range missile at any time as a show of strength despite diplomatic efforts to soften its position.

The top US military commander in Europe has said that several Nato countries are working on contingency plans for possible military action to end the two-year civil war in Syria.

French troops pressed northwards in Mali today, towards territory occupied for months by Islamist militants, military officials said, announcing the start of a land assault which will put soldiers in direct combat “within hours”.

French air strikes in Mali have driven back Islamist rebels from a key city and destroyed a militant command centre, the French defence minister said today.

IN the final scene of Zero Dark Thirty, Kathryn Bigelow’s heart-stopping thriller about the hunt for Osama bin Laden, Maya, a CIA operative and the movie’s heroine, is strapped into a seat on a military transport plane staring into the middle distance, looking depleted.

Internal emails among US military officers indicate that no sailors watched Osama bin Laden’s burial at sea from the USS Carl Vinson and traditional Islamic procedures were followed during the ceremony.

A man believed to be the leader of the Gulf drug cartel, which controls some of the most valuable and violently contested smuggling routes along the US border, was arrested by Mexican marines and paraded before the public.

There were more high spirits than high winds to set the first day of competitive racing off to a breezy start at Cork Week yesterday as sailors and landlubbers descended on Crosshaven for the biennial event.

Boats have already begun to sail into Crosshaven which this week hosts Cork Week, a biennial event of racing and rollicking that attracts hundreds of sailors worldwide to the Royal Cork Yacht Club.

There are any amount of hoary old legends associated with the seven seas and those who sail them and the Volvo Ocean Race is no different.

Iran has begun to design its first nuclear submarine, a semi-official news agency in the country has reported.

The Nato chief today pledged the alliance will hand over responsibility for securing Afghanistan to the country's domestic forces by the end of 2014 as scheduled.

British defence secretary Philip Hammond rejected claims that Britain would be unable to defend the Falklands against an Argentinian assault as both countries marked the 30-year anniversary of the war in the South Atlantic.