The Royal Caribbean ship returned to Singapore on day three of a four-day “cruise to nowhere” after a passenger tested positive for Covid-19.
The “cruises to nowhere” that start and end at the same port without stops was launched last month.
They are an attempt to revive the hard-hit cruise industry, which largely came to a global standstill after ships saw large outbreaks early in the pandemic.
Singapore’s special cruises are only open to its residents.
The Royal Caribbean cruise ship Quantum of the Seas left Singapore on Monday for a four-day round trip as part of a “safe cruising” scheme announced by the country’s tourism board in October.
The cruise company said it had turned the ship around after one guest tested positive for coronavirus after checking in with the on-board medical team.
“We identified and isolated all guests and crew who had close contact with this guest, and each of those individuals have subsequently tested negative for the virus,” it said in a statement.
The firm added that passengers would be allowed to disembark “after a review of contact tracing is completed”.
According to a local daily newspaper there were 1,680 guests and 1,448 crew members on board.
The passenger who tested positive for Covid-19 was an 83-year-old Singaporean who first reported to the ship’s medical centre with diarrhoea and underwent a coronavirus test as part of on-board protocols, it added.
A raft of safety measures were introduced for passengers on the special cruises to nowhere, including Covid-19 tests before boarding and after disembarking. The ships were also running at half their usual capacity for safe distancing purposes.
The cruise industry was hit hard early in the pandemic, when the virus first swept the Diamond Princess in Japan and then the Grand Princess in the US, resulting in passengers being quarantined at sea after hundreds contracted the virus onboard.
Royal Caribbean has said another cruise scheduled to depart on Thursday will go ahead.