With most of the world's cruiseship fleet still idle, owners will take whatever work they can get.
A few ships have tried "cruises to nowhere", while the Tokyo Olympics holds out hope for some operators clinching accommodation deals.
Estonian group Tallink, however, is set to welcome 1,000 UK police officers on board its 3,013-passenger cruise ferry Silja Europa (built 1993) next month.
The vessel has been booked to moor at Falmouth during the G7 summit in Cornwall from 11 to 13 June.
The officers will help safeguard delegates from Canada, France, Germany, Italy, Japan, the UK and the US as part of the Devon and Cornwall force's largest-ever security operation.
More than 5,000 police personnel will be involved in total.
The decision to charter the ship was taken after a number of options were considered. The force said it had taken into account operational needs and any environmental impact.
Joe Biden due in UK
Heads of government including US President Joe Biden will be in attendance.
The UK, which holds the G7 presidency this year, has also invited representatives from Australia, India, South Korea and South Africa to the get-together.
The Silja Europa is one of the largest cruise ferries in the world.
The ship is famous in Estonia as the first to receive a Mayday message from the Estonia, the ferry that sank in 1994 in the country's worst maritime disaster. The Silja Europa was the second ship to arrive at the scene.
The vessel's master Esa Makela was appointed the commander for the rescue operation.
Of the 989 people on board the Estonia, 138 were saved.
Tallink bought the Silja Europa from Silja Line in 2006.
Cruises between Tallinn and Helsinki are suspended until 23 June, Tallink's website says.
In 2018, Tokyo's metropolitan government chartered an MSC Cruises ship for the 2020 Olympics.
The 65,000-gt MSC Lirica (built 2003) was due to operate as a hotel vessel during the summer games and the Paralympics.
Central government had been taking measures to address an expected shortage of hotel beds.
But the games were pushed back to this summer due to the coronavirus pandemic.
