Lincoln president Kumar Galhotra looks on during the unveiling of the new Lincoln Nautilus at the Los Angeles Auto Show in Los Angeles, California U.S. November 29, 2017. REUTERS/Lucy Nicholson 

View of the grille on a Lincoln Nautilus SUV being displayed at the Los Angeles Auto Show in Los Angeles, California U.S. November 29, 2017. REUTERS/Lucy Nicholson 

Detail view of the grille on a Lincoln Nautilus SUV being displayed at the Los Angeles Auto Show in Los Angeles, California U.S. November 29, 2017. REUTERS/Lucy Nicholson 

The Lincoln Nautilus SUV is displayed at the Los Angeles Auto Show in Los Angeles, California U.S. November 29, 2017. REUTERS/Lucy Nicholson 

The Lincoln Nautilus SUV is prepared for showing at the Los Angeles Auto Show in Los Angeles, California U.S. November 29, 2017. REUTERS/Lucy Nicholson 

Rear detail view of a Lincoln Nautilus SUV being displayed at the Los Angeles Auto Show in Los Angeles, California U.S. November 29, 2017. REUTERS/Lucy Nicholson 

The Lincoln Motor Company's Nautilus SUV is shown under wrap before being unveiled at the Los Angeles Auto Show in Los Angeles, California U.S. November 29, 2017. REUTERS/Lucy Nicholson 

Passenger side view of a Lincoln Nautilus SUV being displayed at the Los Angeles Auto Show in Los Angeles, California U.S. November 29, 2017. REUTERS/Lucy Nicholson 

Front quarter detail view of a Lincoln Nautilus SUV being displayed at the Los Angeles Auto Show in Los Angeles, California U.S. November 29, 2017. REUTERS/Lucy Nicholson 

Detail view of the grille on a Lincoln Nautilus SUV being displayed at the Los Angeles Auto Show in Los Angeles, California U.S. November 29, 2017. REUTERS/Lucy Nicholson 

The Lincoln Nautilus SUV is displayed at the Los Angeles Auto Show in Los Angeles, California U.S. November 29, 2017. REUTERS/Lucy Nicholson 

Detail view of a wheel on a Lincoln Nautilus SUV being displayed at the Los Angeles Auto Show in Los Angeles, California U.S. November 29, 2017. REUTERS/Lucy Nicholson 

Detail view of the driver's door mirror on a Lincoln Nautilus SUV being displayed at the Los Angeles Auto Show in Los Angeles, California U.S. November 29, 2017. REUTERS/Lucy Nicholson 

The Lincoln Nautilus SUV is displayed at the Los Angeles Auto Show in Los Angeles, California U.S. November 29, 2017. REUTERS/Lucy Nicholson 

The Lincoln Nautilus SUV is displayed at the Los Angeles Auto Show in Los Angeles, California U.S. November 29, 2017. REUTERS/Lucy Nicholson 

The Lincoln Nautilus SUV is displayed at the Los Angeles Auto Show in Los Angeles, California U.S. November 29, 2017. REUTERS/Lucy Nicholson 

The Lincoln Nautilus SUV is displayed at the Los Angeles Auto Show in Los Angeles, California U.S. November 29, 2017. REUTERS/Lucy Nicholson 

The home-made submarine "UC3 Nautilus", built by Danish inventor Peter Madsen, who is charged with killing Swedish journalist Kim Wall in his submarine, sails in the harbour of Copenhagen, Denmark, August 10, 2017. Picture taken August 10, 2017. REUTERS/Peter Thompson 

The home-made submarine "UC3 Nautilus", built by Danish inventor Peter Madsen, who is charged with killing Swedish journalist Kim Wall in his submarine, sails in the harbour of Copenhagen, Denmark, August 10, 2017. Picture taken August 10, 2017. REUTERS/Peter Thompson 

Components of a second subsea mining machine being built by Soil Machine Dynamics (SMD) for Nautilus Minerals are seen at Wallsend, northern England April 14, 2014. High-tech advances, depleted easy-to-reach minerals onshore and historically high prices have boosted the idea of mining offshore, where metals can be fifteen times the quality of land deposits. The world's first deep sea mining robot sits idle on a British factory floor, waiting to claw up high grade copper and gold from the seabed off Papua New Guinea (PNG) - when a wrangle over terms is solved. Built by SMD, it will put Canadian listed Nautilus Minerals on course to become the first company to commercially mine in deep water. Picture taken April 14. REUTERS/ Nigel Roddis (BRITAINSOCIETY - Tags: BUSINESS COMMODITIES) 

Employees of Soil Machine Dynamics (SMD) work on a subsea mining machine being built for Nautilus Minerals at Wallsend, northern England April 14, 2014. High-tech advances, depleted easy-to-reach minerals onshore and historically high prices have boosted the idea of mining offshore, where metals can be fifteen times the quality of land deposits. The world's first deep sea mining robot sits idle on a British factory floor, waiting to claw up high grade copper and gold from the seabed off Papua New Guinea (PNG) - when a wrangle over terms is solved. Built by SMD, it will put Canadian listed Nautilus Minerals on course to become the first company to commercially mine in deep water. Picture taken April 14. REUTERS/ Nigel Roddis (BRITAIN - Tags: SOCIETY BUSINESS COMMODITIES) 

Employees of Soil Machine Dynamics (SMD) work on a subsea mining machine being built for Nautilus Minerals at Wallsend, northern England April 14, 2014. High-tech advances, depleted easy-to-reach minerals onshore and historically high prices have boosted the idea of mining offshore, where metals can be fifteen times the quality of land deposits. The world's first deep sea mining robot sits idle on a British factory floor, waiting to claw up high grade copper and gold from the seabed off Papua New Guinea (PNG) - when a wrangle over terms is solved. Built by SMD, it will put Canadian listed Nautilus Minerals on course to become the first company to commercially mine in deep water. Picture taken April 14. REUTERS/ Nigel Roddis (BRITAIN - Tags: SOCIETY BUSINESS COMMODITIES) 

Employees of Soil Machine Dynamics (SMD) work on a subsea mining machine being built for Nautilus Minerals at Wallsend, northern England April 14, 2014. High-tech advances, depleted easy-to-reach minerals onshore and historically high prices have boosted the idea of mining offshore, where metals can be fifteen times the quality of land deposits. The world's first deep sea mining robot sits idle on a British factory floor, waiting to claw up high grade copper and gold from the seabed off Papua New Guinea (PNG) - when a wrangle over terms is solved. Built by SMD, it will put Canadian listed Nautilus Minerals on course to become the first company to commercially mine in deep water. Picture taken April 14. REUTERS/ Nigel Roddis (BRITAIN - Tags: SOCIETY BUSINESS COMMODITIES) 

An engineer is seen in the control room being constructed for the subsea mining machines Soil Machine Dynamics (SMD) is building for Nautilus Minerals at Wallsend, northern England April 14, 2014. High-tech advances, depleted easy-to-reach minerals onshore and historically high prices have boosted the idea of mining offshore, where metals can be fifteen times the quality of land deposits. The world's first deep sea mining robot sits idle on a British factory floor, waiting to claw up high grade copper and gold from the seabed off Papua New Guinea (PNG) - when a wrangle over terms is solved. Built by SMD, it will put Canadian listed Nautilus Minerals on course to become the first company to commercially mine in deep water. Picture taken April 14. REUTERS/ Nigel Roddis (BRITAIN - Tags: SOCIETY BUSINESS COMMODITIES) 

Employees stand near components of a subsea mining machine being assembled by Soil Machine Dynamics (SMD) for Nautilus Minerals at Wallsend, northern England April 14, 2014. High-tech advances, depleted easy-to-reach minerals onshore and historically high prices have boosted the idea of mining offshore, where metals can be fifteen times the quality of land deposits. The world's first deep sea mining robot sits idle on a British factory floor, waiting to claw up high grade copper and gold from the seabed off Papua New Guinea (PNG) - when a wrangle over terms is solved. Built by SMD, it will put Canadian listed Nautilus Minerals on course to become the first company to commercially mine in deep water. Picture taken April 14. REUTERS/ Nigel Roddis (BRITAINSOCIETY - Tags: BUSINESS COMMODITIES) 

An electrician wires up a subsea mining machine being built by Soil Machine Dynamics (SMD) for Nautilus Minerals at Wallsend, northern England April 14, 2014. High-tech advances, depleted easy-to-reach minerals onshore and historically high prices have boosted the idea of mining offshore, where metals can be fifteen times the quality of land deposits. The world's first deep sea mining robot sits idle on a British factory floor, waiting to claw up high grade copper and gold from the seabed off Papua New Guinea (PNG) - when a wrangle over terms is solved. Built by SMD, it will put Canadian listed Nautilus Minerals on course to become the first company to commercially mine in deep water. Picture taken April 14. REUTERS/ Nigel Roddis (BRITAIN - Tags: SOCIETY BUSINESS COMMODITIES) 

An engineer sits in the control room being constructed for the subsea mining machines Soil Machine Dynamics (SMD) is building for Nautilus Minerals at Wallsend, northern England April 14, 2014. High-tech advances, depleted easy-to-reach minerals onshore and historically high prices have boosted the idea of mining offshore, where metals can be fifteen times the quality of land deposits. The world's first deep sea mining robot sits idle on a British factory floor, waiting to claw up high grade copper and gold from the seabed off Papua New Guinea (PNG) - when a wrangle over terms is solved. Built by SMD, it will put Canadian listed Nautilus Minerals on course to become the first company to commercially mine in deep water. Picture taken April 14. REUTERS/ Nigel Roddis (BRITAIN - Tags: SOCIETY BUSINESS COMMODITIES) 

An employee of Soil Machine Dynamics (SMD) works on a subsea mining machine being built for Nautilus Minerals at Wallsend, northern England April 14, 2014. High-tech advances, depleted easy-to-reach minerals onshore and historically high prices have boosted the idea of mining offshore, where metals can be fifteen times the quality of land deposits. The world's first deep sea mining robot sits idle on a British factory floor, waiting to claw up high grade copper and gold from the seabed off Papua New Guinea (PNG) - when a wrangle over terms is solved. Built by SMD, it will put Canadian listed Nautilus Minerals on course to become the first company to commercially mine in deep water. Picture taken April 14. REUTERS/ Nigel Roddis (BRITAIN - Tags: SOCIETY BUSINESS COMMODITIES) 

Employees of Soil Machine Dynamics (SMD) work on a subsea mining machine being built for Nautilus Minerals at Wallsend, northern England April 14, 2014. High-tech advances, depleted easy-to-reach minerals onshore and historically high prices have boosted the idea of mining offshore, where metals can be fifteen times the quality of land deposits. The world's first deep sea mining robot sits idle on a British factory floor, waiting to claw up high grade copper and gold from the seabed off Papua New Guinea (PNG) - when a wrangle over terms is solved. Built by SMD, it will put Canadian listed Nautilus Minerals on course to become the first company to commercially mine in deep water. Picture taken April 14. REUTERS/ Nigel Roddis (BRITAIN - Tags: SOCIETY BUSINESS COMMODITIES) 

Components of a subsea mining machine are seen being assembled by Soil Machine Dynamics (SMD) for Nautilus Minerals at Wallsend, northern England April 14, 2014. High-tech advances, depleted easy-to-reach minerals onshore and historically high prices have boosted the idea of mining offshore, where metals can be fifteen times the quality of land deposits. The world's first deep sea mining robot sits idle on a British factory floor, waiting to claw up high grade copper and gold from the seabed off Papua New Guinea (PNG) - when a wrangle over terms is solved. Built by SMD, it will put Canadian listed Nautilus Minerals on course to become the first company to commercially mine in deep water. Picture taken April 14. REUTERS/ Nigel Roddis (BRITAINSOCIETY - Tags: BUSINESS COMMODITIES) 

An employee of Soil Machine Dynamics (SMD) works on a subsea mining machine being built for Nautilus Minerals at Wallsend, northern England April 14, 2014. High-tech advances, depleted easy-to-reach minerals onshore and historically high prices have boosted the idea of mining offshore, where metals can be fifteen times the quality of land deposits. The world's first deep sea mining robot sits idle on a British factory floor, waiting to claw up high grade copper and gold from the seabed off Papua New Guinea (PNG) - when a wrangle over terms is solved. Built by SMD, it will put Canadian listed Nautilus Minerals on course to become the first company to commercially mine in deep water. Picture taken April 14. REUTERS/ Nigel Roddis (BRITAIN - Tags: SOCIETY BUSINESS COMMODITIES) 

An employee of Soil Machine Dynamics (SMD) works on a subsea mining machine being built for Nautilus Minerals at Wallsend, northern England April 14, 2014. High-tech advances, depleted easy-to-reach minerals onshore and historically high prices have boosted the idea of mining offshore, where metals can be fifteen times the quality of land deposits. The world's first deep sea mining robot sits idle on a British factory floor, waiting to claw up high grade copper and gold from the seabed off Papua New Guinea (PNG) - when a wrangle over terms is solved. Built by SMD, it will put Canadian listed Nautilus Minerals on course to become the first company to commercially mine in deep water. Picture taken April 14. REUTERS/ Nigel Roddis (BRITAIN - Tags: SOCIETY BUSINESS COMMODITIES) 

Aquarist Bret Grasse feeds a Chambered nautilus in preparation for the upcoming "Tentacles: The Astounding Lives of Octopuses, Squid and Cuttlefishes" exhibition at the Monterey Bay Aquarium in Monterey, California, April 8, 2014. The $3.5 million exhibition, which opens April 12, will feature some species being raised and exhibited for the first time anywhere in the world. REUTERS/Michael Fiala (UNITED STATES - Tags: ANIMALS ENVIRONMENT SOCIETY) 

Nautilus, a Golden Retriever, gets dried after a bath by handler Diana Mason during the 138th Westminster Kennel Club Dog Show in New York, February 11, 2014. REUTERS/Ray Stubblebine (UNITED STATES - Tags: ANIMALS SOCIETY) 

An elderly couple explores "Nautilus", a vintage camping caravan redesigned after Jules Vernes' novel "20,000 Leagues under the Sea" at the Base Camp Bonn Young Hostel, the world's first camping trailer and Pullman coach hostel, in Bonn September 20, 2013. The hostel was opened in August this year in a former storage facility, consists of 15 various camping caravans in vintage style, two former railway Pullman coaches and four U.S. Airstream trailers all with shared washrooms. The prices of the 120 beds in the 1600 square meter indoor complex range from 22 to 69 euros per night. Each trailer was individually designed by film and TV outfitter Marion Seul. Picture taken September 20, 2013. REUTERS/Wolfgang Rattay (GERMANY - Tags: SOCIETY TRAVEL) 

Nautiluses swim in the Underwater World Singapore's new exhibition "Masters of Disguise" November 13, 2008. The nautilus is the only member of the Cephalopod class to have a fully developed external shell that encases its entire body. REUTERS/David Loh (SINGAPORE) 

A nautilus swims in the Underwater World Singapore's new exhibition "Masters of Disguise" November 13, 2008. The nautilus is the only member of the Cephalopod class to have a fully developed external shell that encases its entire body. REUTERS/David Loh (SINGAPORE) 

A nautilus swims in the Underwater World Singapore's new exhibition "Masters of Disguise" November 13, 2008. The nautilus is the only member of the Cephalopod class to have a fully developed external shell that encases its entire body. REUTERS/Edgar Su (SINGAPORE) 

Nautili swim in the Underwater World Singapore's new exhibition "Masters of Disguise" November 13, 2008. The nautilus is the only member of the Cephalopod class to have a fully developed external shell that encases its entire body. REUTERS/Edgar Su (SINGAPORE) 

A nautilus swims in the Underwater World Singapore's new exhibition "Masters of Disguise" November 13, 2008. The nautilus is the only member of the Cephalopod class to have a fully developed external shell that encases its entire body. REUTERS/Edgar Su (SINGAPORE) 

A nautilus swims in the Underwater World Singapore's new exhibition "Masters of Disguise" November 13, 2008. The nautilus is the only member of the Cephalopod class to have a fully developed external shell that encases its entire body. REUTERS/Edgar Su (SINGAPORE) 

The Nautilus E-30 electric drayage truck is seen at the port of Los Angeles July 2, 2008. The ports of Los Angeles and Long Beach are requiring cleaner vessel fuels, shoreside electricity so ships will not run their dirty diesel engines at berth, newer truck fleets and cleaner train locomotives. To match feature ENVIRONMENT-PORTS/ REUTERS/Mario Anzuoni (UNITED STATES) 

The Nautilus E-30 electric drayage truck is seen at the port of Los Angeles on July 2 , 2008. REUTERS/Mario Anzuoni (UNITED STATES) 

The Nautilus E-30 electric drayage truck is seen at the port of Los Angeles on July 2 , 2008. REUTERS/Mario Anzuoni (UNITED STATES)