A crew of Norwegian sailors has shared their frightening experience of surviving an attack by killer whales, just before the same group sank a nearby tourist vessel.

The Norwegian Najad 570 ‘Nova Vida’ set out on Saturday to sail from Cascais, off the coast of Lisbon, to Sines when they were attacked by orcas.

Footage recorded from their boat’s cockpit, provided to the Daily Mail, captured steering wheels spinning uncontrollably as killer whales surrounded them at around noon on September 13.

Lisa Festervoll, a crew member, mentioned that they had been on their journey for two weeks and were mindful of recent orca encounters in the region, which they had been tracking.

‘There is very little you can do to avoid the attacks completely, and it seems that a lot of it is luck,’ she told Seilmagasinet.

When the orcas abruptly targeted their helm, the sailors quickly reversed their boat. The rudder sustained significant damage, causing them to swiftly lose control, according to Festervoll.

The whole boat shook, ‘hit hard and quickly’. They were ‘in disbelief’ as a six-metre long killer whale passed by the side of the vessel.

After multiple hits to the rudders, their vessel started spinning in circles. A tracking device logged the boat completing eight rotations as the crew struggled to repel the whales.

Desperate to counter the threat, they employed whatever resources were available, such as pouring vinegar on the orcas, uncertain if it would actually discourage the attacks.

But after ‘several intense minutes and hard hits on the rudder’, the whales finally moved on to the nearby Oceanview to join up with a pod attacking the sinking boat.

Footage showed the crew walking on the deck, pouring vinegar into the ocean as the boat turned in rapid circles.

The crew maintained composure and poured liquid from a large water bottle around the boat as to not feel helpless. 

Whether or not it worked, the orcas circling the Nova Vida eventually gave up and joined the five or six others tracking the Oceanview.

Oceanview, a tourist boat, was ‘ravaged’ by the orcas until it sank. Pictures shared with the Mail showed the stern sticking out above the waves, the rest underwater.

All five people on board were rescued, but the crew on board the Nova Vida spent another hour and a half sat waiting for help.

Festervoll said they could only ‘cross their fingers’ that the pod would not return to attack their damaged boat. 

The Norwegians could be seen in the background of video footage as the Oceanview tourist boat was rushed until it sank off Fonte da Telha beach on Saturday.

In the end, the crew of the Nova Vida were able to install their emergency rudder and pry it enough to get them the 10 nautical miles back to Cascais, to the north.

A rib from the coast guard came to support, driving alongside on standby.

The Nova Vida will need a few weeks of repairs before it is ready to set sail again.

Morten, one of the crew members, plans to cross the Atlantic in the battle-hardened Najad 570.

Local media reports that four people had to be rescued after being rammed by the same pod that attacked the five on the Oceanview.

Portuguese coastguard officials said the Oceanview sinking occurred approximately five nautical miles from the beach at Fonte da Telha.

Footage of the incident shared by sailing company Mercedes-Benz Oceanic Lounge showed an orca repeatedly striking the underside of the yacht.

Bernardo Queiroz, director of the Oceanic Lounge, said his vessel was on a dolphin watching tour when they noticed the Oceanview making erratic movements. 

The Portuguese coast guard was called in two days later, on Monday, to save four people stuck on a sailboat in Costa da Caparica that suffered ‘successive collisions … caused by orcas’, before being accompanied on to the port of Cascais, to the north.

Attacks are relatively common. Between 2020 and 2023 there were reportedly around 500 attacks. 

No humans have been injured, but 20 per cent of the vessels have been damaged and several were lost.