A joyful family trip to the Bahamas has turned into a desperate race against time after a small plane carrying a Florida couple and two of their grandchildren disappeared over the ocean while flying home.

Mario Lamar, 80, was piloting the five-seat Piper PA-34 when it went down approximately 13 miles west of Andros Island on Monday afternoon, according to Bahamian authorities.

His wife, Lili Lamar, 79, and their grandchildren Sofia Sosa, 28, and Christian Sosa, 22, were also aboard.

The aircraft had departed Great Harbour Cay and was headed toward Opa-locka, Florida, when something apparently went terribly wrong.

Flight-tracking data reportedly showed the plane’s speed fluctuating rapidly before its altitude fell from around 10,000 feet to approximately 3,700 feet in only three minutes.

Then it vanished from radar.

Now, as Bahamian authorities and the U.S. Coast Guard search the surrounding waters, the missing family’s relatives are pleading for help.

“We need to bring them home,” Mario and Lili’s niece, Silvia Larrieu, said.

A Final Weekend at Their “Second Home”

For the Lamar family, Great Harbour Cay was far more than a vacation destination.

Relatives said Mario and Lili had spent much of their lives traveling there and regarded it as a second home. They had gathered with their grandchildren over Labor Day weekend, enjoying the island and watching the sunset together before beginning their journey back to Florida.

“They’ve spent their whole life going there,” Larrieu told the Miami Herald. “They were coming home.”

The group reportedly departed Monday morning aboard the private twin-engine aircraft, with Mario in command.

His family described him as an experienced and well-trained pilot with more than 40 years of flying behind him. But even decades of experience could not eliminate the dangers posed by rapidly changing conditions over open water.

At approximately 2:20 p.m., the Royal Bahamas Police Force received a report that the Florida-bound aircraft had plunged into the sea.

No official cause of the apparent crash has been established.

Rough Weather Delays Search

The aircraft’s last known location presented immediate difficulties for rescuers.

Larrieu said rough weather near the northern end of Andros Island initially prevented Bahamian forces from beginning an immediate search of the area.

That delay intensified the anguish for relatives waiting for information hundreds of miles away.

“Please help,” Larrieu said in a video appeal. “I ask anybody out there, if you can help with search and rescue efforts, we would greatly appreciate it.”

The U.S. Coast Guard has joined Bahamian authorities in the operation, deploying an HC-144 Ocean Sentry aircraft to assist in searching for the missing plane and its four occupants.

The Ocean Sentry is used for maritime patrol, surveillance and search-and-rescue missions. From above, its crew can scan vast areas of water while helping coordinate with vessels and other aircraft.

Every hour is critical, but officials have not publicly confirmed whether wreckage or any sign of the missing passengers has been found.

Two Young Lives Just Beginning

The family’s disappearance is especially painful because both grandchildren had recently completed major milestones.

Sofia Sosa was a recent graduate of Wake Forest University, while her brother Christian had recently graduated from Loyola Marymount University.

Their Bahamas trip should have been another cherished chapter in a family tradition—a holiday spent with grandparents at a place filled with years of memories.

Instead, their relatives are now confronting a nightmare in which the people they love simply disappeared between one island and the Florida coast.

The last available flight data offers a chilling glimpse of the aircraft’s final recorded moments but does not explain what happened inside the cockpit.

A sudden loss of altitude can have numerous causes, including mechanical problems, severe weather or an in-flight emergency. Investigators would need physical evidence, aircraft records and other data before drawing any conclusions.

For now, determining the cause remains secondary to finding the missing family.

Search Continues Across Open Water

Searching for a small aircraft in the waters surrounding the Bahamas can be exceptionally challenging.

Weather, currents and limited visibility may move debris or survivors away from an aircraft’s last known position. Search teams must examine a huge and constantly changing area, often with few immediate clues.

Yet the family continues to hold on to hope.

Mario was deeply familiar with the journey, his relatives said. The Bahamas had been part of the family’s life for decades, and Monday’s flight was supposed to be a routine return from a beloved home away from home.

The four passengers remain missing, and no official determination has been made about their fate.

Behind the coordinates, radar records and rescue aircraft is a family waiting beside silent phones—desperate for any message that could end the uncertainty.

A grandfather, a grandmother and two young graduates left the islands together after watching one more Bahamas sunset.

Their loved ones are now asking rescuers not to stop until they bring them home.