Names of boats are seen on a stand during the Monaco Yacht Show, one of the most prestigious pleasure boat shows in the world, highlighting hundreds of yachts for the luxury yachting industry in port of Monaco, September 25, 2019. REUTERS/Eric Gaillard

A general view shows the port of Monaco during the Monaco Yacht Show, one of the most prestigious pleasure boat shows in the world, highlighting hundreds of yachts for the luxury yachting industry in port of Monaco, September 25, 2019. REUTERS/Eric Gaillard

A general view shows Monaco Principality during the Monaco Yacht Show, one of the most prestigious pleasure boat shows in the world, highlighting hundreds of yachts for the luxury yachting industry in port of Monaco, September 25, 2019. REUTERS/Eric Gaillard

Luxury boats are seen during the Monaco Yacht Show, one of the most prestigious pleasure boat shows in the world, highlighting hundreds of yachts for the luxury yachting industry in port of Monaco, September 25, 2019. REUTERS/Eric Gaillard

Luxury boats are seen during the Monaco Yacht Show, one of the most prestigious pleasure boat shows in the world, highlighting hundreds of yachts for the luxury yachting industry in port of Monaco, September 25, 2019. REUTERS/Eric Gaillard

Shoes of visitors are seen during the Monaco Yacht Show, one of the most prestigious pleasure boat shows in the world, highlighting hundreds of yachts for the luxury yachting industry in port of Monaco, September 25, 2019. REUTERS/Eric Gaillard

Luxury boats are seen during the Monaco Yacht Show, one of the most prestigious pleasure boat shows in the world, highlighting hundreds of yachts for the luxury yachting industry in port of Monaco, September 25, 2019. REUTERS/Eric Gaillard

A sign reads "Private yacht. No boarding" during the Monaco Yacht Show, one of the most prestigious pleasure boat shows in the world, highlighting hundreds of yachts for the luxury yachting industry in port of Monaco, September 25, 2019. REUTERS/Eric Gaillard

A visitor takes off her shoes before boarding a boat during the Monaco Yacht Show, one of the most prestigious pleasure boat shows in the world, highlighting hundreds of yachts for the luxury yachting industry in port of Monaco, September 25, 2019. REUTERS/Eric Gaillard

Luxury boats are seen during the Monaco Yacht Show, one of the most prestigious pleasure boat shows in the world, highlighting hundreds of yachts for the luxury yachting industry in port of Monaco, September 25, 2019. REUTERS/Eric Gaillard

Luxury boats are seen during the Monaco Yacht Show, one of the most prestigious pleasure boat shows in the world, highlighting hundreds of yachts for the luxury yachting industry in port of Monaco, September 25, 2019. REUTERS/Eric Gaillard

Luxury boats are seen during the Monaco Yacht Show, one of the most prestigious pleasure boat shows in the world, highlighting hundreds of yachts for the luxury yachting industry in port of Monaco, September 25, 2019. REUTERS/Eric Gaillard

Luxury boats are seen during the Monaco Yacht Show, one of the most prestigious pleasure boat shows in the world, highlighting hundreds of yachts for the luxury yachting industry in port of Monaco, September 25, 2019. REUTERS/Eric Gaillard

A visitor attends the Monaco Yacht Show, one of the most prestigious pleasure boat shows in the world, highlighting hundreds of yachts for the luxury yachting industry in port of Monaco, September 25, 2019. REUTERS/Eric Gaillard

Luxury boats are seen during the Monaco Yacht Show, one of the most prestigious pleasure boat shows in the world, highlighting hundreds of yachts for the luxury yachting industry in port of Monaco, September 25, 2019. REUTERS/Eric Gaillard

Luxury boats are seen during the Monaco Yacht Show, one of the most prestigious pleasure boat shows in the world, highlighting hundreds of yachts for the luxury yachting industry in port of Monaco, September 25, 2019. REUTERS/Eric Gaillard

A pleasure boat sails along the Thames as the sun sets behind The Shard in London, Britain, December 3, 2018. REUTERS/Simon Dawson

A man tries to retrieve possessions from a smashed pleasure boat as strong winds and rough seas batter the coast of the Maltese islands, in St Paul's Bay, Malta September 26, 2018. REUTERS/Darrin Zammit Lupi

A visitor attends the Monaco Yacht show, one of the most prestigious pleasure boat shows in the world, highlighting hundreds of yachts for the luxury yachting industry in port of Monaco, September 26, 2018. REUTERS/Eric Gaillard

Luxury boats are seen during the Monaco Yacht show, one of the most prestigious pleasure boat shows in the world, highlighting hundreds of yachts for the luxury yachting industry in the port of Monaco, September 26, 2018. REUTERS/Eric Gaillard

Luxury boats are seen during the Monaco Yacht show, one of the most prestigious pleasure boat shows in the world, highlighting hundreds of yachts for the luxury yachting industry in port of Monaco, September 26, 2018. REUTERS/Eric Gaillard

A helicopter is seen on the deck of a luxury boats during the Monaco Yacht show, one of the most prestigious pleasure boat shows in the world, highlighting hundreds of yachts for the luxury yachting industry in port of Monaco, September 26, 2018. REUTERS/Eric Gaillard

An helicopter is seen on the deck of a luxury boats during the Monaco Yacht show, one of the most prestigious pleasure boat shows in the world, highlighting hundreds of yachts for the luxury yachting industry in port of Monaco, September 26, 2018. REUTERS/Eric Gaillard

Luxury boats are seen during the Monaco Yacht show, one of the most prestigious pleasure boat shows in the world, highlighting hundreds of yachts for the luxury yachting industry in port of Monaco, September 26, 2018. REUTERS/Eric Gaillard

A sign reads "Private yacht no boarding" during the Monaco Yacht show, one of the most prestigious pleasure boat shows in the world, highlighting hundreds of yachts for the luxury yachting industry in port of Monaco, September 26, 2018. REUTERS/Eric Gaillard

Luxury boats are seen during the Monaco Yacht show, one of the most prestigious pleasure boat shows in the world, highlighting hundreds of yachts for the luxury yachting industry in port of Monaco, September 26, 2018. REUTERS/Eric Gaillard

An helicopter is seen on the deck of a luxury boats during the Monaco Yacht show, one of the most prestigious pleasure boat shows in the world, highlighting hundreds of yachts for the luxury yachting industry in port of Monaco, September 26, 2018. REUTERS/Eric Gaillard

A general view shows the port of Monaco where takes place the Monaco Yacht show, one of the most prestigious pleasure boat shows in the world, highlighting hundreds of yachts for the luxury yachting industry in port of Monaco, September 26, 2018. REUTERS/Eric Gaillard

Luxury boats are seen during the Monaco Yacht show, one of the most prestigious pleasure boat shows in the world, highlighting hundreds of yachts for the luxury yachting industry in port of Monaco, September 26, 2018. REUTERS/Eric Gaillard

Luxury boats are seen during the Monaco Yacht show, one of the most prestigious pleasure boat shows in the world, highlighting hundreds of yachts for the luxury yachting industry in port of Monaco, September 26, 2018. REUTERS/Eric Gaillard

Luxury boats are seen during the Monaco Yacht show, one of the most prestigious pleasure boat shows in the world, highlighting hundreds of yachts for the luxury yachting industry in port of Monaco, September 26, 2018. REUTERS/Eric Gaillard

People travel on pleasure boats in front of the Cairo tower and hotels on the River Nile during Eid al-Adha or Festival of Sacrifice, in Cairo, Egypt August 23, 2018. REUTERS/Mohamed Abd El Ghany

People take a ride on pleasure boats on the River Nile during Eid al-Adha or Festival of Sacrifice, in Cairo, Egypt August 23, 2018. REUTERS/Mohamed Abd El Ghany

People travel on pleasure boats on the River Nile during Eid al-Adha or Festival of Sacrifice, in Cairo, Egypt August 23, 2018. REUTERS/Mohamed Abd El Ghany

People travel on pleasure boats on the River Nile during Eid al-Adha or Festival of Sacrifice, in Cairo, Egypt August 23, 2018. REUTERS/Mohamed Abd El Ghany

People take a ride on pleasure boats on the River Nile during Eid al-Adha or Festival of Sacrifice, in Cairo, Egypt August 23, 2018. REUTERS/Mohamed Abd El Ghany

Egyptians enjoy travel at pleasure boats in front of the Cairo tower during the Muslim holy fasting month of Ramadan in Cairo, Egypt June 12, 2018. Picture taken June 12, 2018. REUTERS/Amr Abdallah Dalsh

Egyptians enjoy travel at pleasure boats in front of the Cairo tower and hotels on the River Nile during the Muslim holy fasting month of Ramadan in Cairo, Egypt June 12, 2018. Picture taken June 12, 2018. REUTERS/Amr Abdallah Dalsh

A pleasure boat passes a loading terminal on the Ohio River near Shadyside, Ohio, U.S., September 10, 2017. Photograph taken at N39°54.907' W80°46.946'. Photograph taken September 10, 2017. REUTERS/Brian Snyder

A general view shows Monaco Principality during the Monaco Yacht show, one of the most prestigious pleasure boat show in the world, highlighting hundreds of yachts for the luxury yachting industry and welcomes 580 leading companies, in the port of Monaco, September 27, 2017. REUTERS/Eric Gaillard

A general view shows Monaco Principality during the Monaco Yacht show, one of the most prestigious pleasure boat show in the world, highlighting hundreds of yachts for the luxury yachting industry and welcomes 580 leading companies, in the port of Monaco, September 27, 2017. REUTERS/Eric Gaillard

A general view shows Monaco Principality during the Monaco Yacht show, one of the most prestigious pleasure boat show in the world, highlighting hundreds of yachts for the luxury yachting industry and welcomes 580 leading companies, in the port of Monaco, September 27, 2017. REUTERS/Eric Gaillard

The Glider Sport Limousine 24 yacht is seen during the Monaco Yacht show, one of the most prestigious pleasure boat show in the world, highlighting hundreds of yachts for the luxury yachting industry and welcomes 580 leading companies, in the port of Monaco, September 27, 2017. REUTERS/Eric Gaillard

The dining room aboard the Scout super yacht is seen during the Monaco Yacht show, one of the most prestigious pleasure boat show in the world, highlighting hundreds of yachts for the luxury yachting industry and welcomes 580 leading companies, in the port of Monaco, September 27, 2017. REUTERS/Eric Gaillard

The lounge aboard the Scout super yacht is seen during the Monaco Yacht show, one of the most prestigious pleasure boat show in the world, highlighting hundreds of yachts for the luxury yachting industry and welcomes 580 leading companies, in the port of Monaco, September 27, 2017. REUTERS/Eric Gaillard

The jacuzzi aboard the Scout super yacht is seen during the Monaco Yacht show, one of the most prestigious pleasure boat show in the world, highlighting hundreds of yachts for the luxury yachting industry and welcomes 580 leading companies, in the port of Monaco, September 27, 2017. REUTERS/Eric Gaillard

The master bedroom aboard the Scout super yacht is seen during the Monaco Yacht show, one of the most prestigious pleasure boat show in the world, highlighting hundreds of yachts for the luxury yachting industry and welcomes 580 leading companies, in the port of Monaco, September 27, 2017. REUTERS/Eric Gaillard

Luxury boats are seen during the Monaco Yacht show, one of the most prestigious pleasure boat show in the world, highlighting hundreds of yachts for the luxury yachting industry and welcomes 580 leading companies, in the port of Monaco, September 27, 2017. REUTERS/Eric Gaillard

Visitors are seen during the Monaco Yacht show, one of the most prestigious pleasure boat show in the world, highlighting hundreds of yachts for the luxury yachting industry and welcomes 580 leading companies, in the port of Monaco, September 27, 2017. REUTERS/Eric Gaillard

Luxury boats are seen during the Monaco Yacht show, one of the most prestigious pleasure boat show in the world, highlighting hundreds of yachts for the luxury yachting industry and welcomes 580 leading companies, in the port of Monaco, September 27, 2017. REUTERS/Eric Gaillard

Luxury boats are seen during the Monaco Yacht show, one of the most prestigious pleasure boat show in the world, highlighting hundreds of yachts for the luxury yachting industry and welcomes 580 leading companies, in the port of Monaco, September 27, 2017. REUTERS/Eric Gaillard

Visitors are seen aboard a Super Yacht Sub 3 submarine during the Monaco Yacht show, one of the most prestigious pleasure boat show in the world, highlighting hundreds of yachts for the luxury yachting industry and welcomes 580 leading companies, in the port of Monaco, September 27, 2017. REUTERS/Eric Gaillard

Luxury boats are seen during the Monaco Yacht show, one of the most prestigious pleasure boat show in the world, highlighting hundreds of yachts for the luxury yachting industry and welcomes 580 leading companies, in the port of Monaco, September 27, 2017. REUTERS/Eric Gaillard

A seagull flies in front of vistors aboard a Super Yacht Sub 3 submarine during the Monaco Yacht show, one of the most prestigious pleasure boat show in the world, highlighting hundreds of yachts for the luxury yachting industry and welcomes 580 leading companies, in the port of Monaco, September 27, 2017. REUTERS/Eric Gaillard

A seagull flies in front of vistors aboard a Super Yacht Sub 3 submarine during the Monaco Yacht show, one of the most prestigious pleasure boat show in the world, highlighting hundreds of yachts for the luxury yachting industry and welcomes 580 leading companies, in the port of Monaco, September 27, 2017. REUTERS/Eric Gaillard

An Airbus H135 helicopter is seen on the deck of a super yacht during the Monaco Yacht show, one of the most prestigious pleasure boat show in the world, highlighting hundreds of yachts for the luxury yachting industry and welcomes 580 leading companies, in the port of Monaco, September 27, 2017. REUTERS/Eric Gaillard

An helicopter is seen on the deck of the "Game Changer" a 69.15 meters super yacht during the Monaco Yacht show, one of the most prestigious pleasure boat show in the world, highlighting hundreds of yachts for the luxury yachting industry and welcomes 580 leading companies, in the port of Monaco, September 27, 2017. REUTERS/Eric Gaillard

An helicopter is seen on the deck of the "Game Changer" a 69.15 meters super yacht during the Monaco Yacht show, one of the most prestigious pleasure boat show in the world, highlighting hundreds of yachts for the luxury yachting industry and welcomes 580 leading companies, in the port of Monaco, September 27, 2017. REUTERS/Eric Gaillard

Luxury boats are seen during the Monaco Yacht show, one of the most prestigious pleasure boat show in the world, highlighting hundreds of yachts for the luxury yachting industry and welcomes 580 leading companies, in the port of Monaco, September 27, 2017. REUTERS/Eric Gaillard