(CNN) Somewhere near the Bahamas, a container ship with 28 Americans and five Polish nationals was still missing Saturday, lost in ocean waters roiled by a Category 4 hurricane.

More than 48 hours since the U.S.-flagged El Faro was last heard from, the Coast Guard pressed its air search in the ferocious conditions of Hurricane Joaquin, with winds blowing 130 mph, for the massive vessel and its cargo of tightly stacked containers and 33 souls.

On Saturday night, the Coast Guard reported one piece of hopeful news.

An airplane involved in the search located a life ring from the El Faro about 75 miles northeast of the ship's last known position, the Coast Guard said in a press release. A Coast Guard MH-60 helicopter recovered the life ring and confirmed it belonged to the missing ship.

"It validates our search efforts and while we are disappointed we did not find the ship today we are hopeful," Coast Guard spokeswoman Marilyn Fajardo said. "Tomorrow, we will have three C-130s flying and the Navy will be assisting again with a P-8 aircraft."

The 790-foot ship and its crew set out Tuesday on what ordinarily should have been a routine voyage from Jacksonville, Florida, to Puerto Rico. But the El Faro was caught in one of the fiercest storms that Mother Nature can conjure. Its last known location was off the Bahamas.

Five aircraft on Saturday searched with radar over the tempestuous seas for the El Faro, which last reported its position and problems Thursday morning.

Photos: Hurricane Joaquin Photos: Hurricane Joaquin Wind and rain from Hurricane Joaquin lashes Nassau, Bahamas, on Friday, October 2. The storm stalled over the Bahamas and then began moving northward later in the day, according to the U.S. National Hurricane Center. Hide Caption 1 of 8 Photos: Hurricane Joaquin Darren Gallo walks home in Long Beach, New York, after two hours of surfing on October 2. The storm might stay in the Atlantic Ocean, away from the U.S. East Coast, but there is still a concern about heavy rain and potential flooding. Hide Caption 2 of 8 Photos: Hurricane Joaquin Volunteers and public works employees load sandbags into people's cars on Friday, October 2, as residents of Alexandria, Virginia, prepare for potential flooding. Hide Caption 3 of 8 Photos: Hurricane Joaquin A man in Nassau puts up plywood shutters to cover store windows on Thursday, October 1. Hide Caption 4 of 8 Photos: Hurricane Joaquin A supermarket worker in Newport News, Virginia, readies cases of bottled water on October 1. Hide Caption 5 of 8 Photos: Hurricane Joaquin A boy walks on a beach in Belmar, New Jersey, on October 1, as front loaders build sand dunes in preparation for Hurricane Joaquin. Hide Caption 6 of 8 Photos: Hurricane Joaquin A boat is removed from the water in Newport News on October 1. Hide Caption 7 of 8 Photos: Hurricane Joaquin A catamaran sails off the coast of Virginia as the USS Harry S. Truman returns to port on October 1. Hide Caption 8 of 8

"The Coast Guard has been doing search and rescue for more than 200 years, and this is right up their wheelhouse," Chief Petty Officer Bobby Nash said.

Three C-130 planes, an H-60 helicopter and a Navy's P-8 plane were all airborne, Nash said.

Since Thursday, search and rescue crews have covered 30,000 square miles, Fajardo said.

Family asks why did ship set sail into storm?

On Friday, ship company officials met with families of the missing crew, CNN affiliate WFOX/WSVN reported.

The El Faro: A container ship missing in Hurricane Joaquin.

"Met with as many families in person we could that have loved ones on board the vessel El Faro," Chiarello told the station.

A majority of the crew has ties to Jacksonville, Florida, said TOTE Services President Phil Greene.

Family members told the affiliate that they wondered why the ship sailed into what was then a tropical storm in the first place. The vessel departed Tuesday from Jacksonville for San Juan, Puerto Rico.

When asked about relatives' questions, Greene told the station: "The captain knew the conditions and communicated back to our headquarters. The conditions were, as he saw them then, favorable. He was very confident the ship was doing well, the crew was quite up to date.

"I think the most critical importance for us is that we share as much information as we have, that we're upfront about the situations as we possibly can be," Greene told the station.

The company is flying some family members to Jacksonville so the firm can meet with them.

Meanwhile, family members are asking everyone to pray, the station reported.

Blinding sea spray

The search teams -- and hopefully the lost ship crew -- have weathered 150 mph gusts, 30-foot waves, and a torrent of rain.

On Friday, the Coast Guard dispatched a cutter ship, an MH-60 Jayhawk rescue helicopter and a C-130 Hercules airplane, but while the C-130 flew as low as 2,000 feet -- far below the normal 10,000 feet for such a storm -- it was not able to get close to El Faro's last known location off the Bahamas.

"There's so much wind, thunderstorms and sea spray that it is difficult to see," Coast Guard Capt. Mark Fedor told CNN's Eric Burnett on Friday. "But our hope is that they are either on the vessel or on life rafts, and we can identify them."

CNN meteorologist Jennifer Gray noted that the ship may have been able to ride out the storm as it passed, or it might have been dragged northward with it. The problem is that, at this point, nobody really knows.

"We know they're disabled," Fedor said. "So really, they're just moving along with the force of the storm."

When it set sail

When the cargo ship set sail Tuesday, its officers were monitoring what was then Tropical Storm Joaquin, according to Tim Nolan, president of TOTE Maritime Puerto Rico.

But all communications was shut off at 7:20 a.m. ET Thursday.

"There are a number of possible reasons for the loss of communications among them the increasing severity of Hurricane Joaquin," Nolan said in a statement.

The Coast Guard received a report Thursday morning that the ship had lost propulsion and was taking on water, but that the flooding had been contained.

The ship was reported to be in distress somewhere near Crooked Island in the Bahamas.