The Coast Guard says it's still searching for four people after a cargo ship overturned in St. Simons Sound Sunday morning. 

Here's what we know about the ship so far.

The Golden Ray is a 'Vehicles Carrier' registered and sailing under the flag of the Marshall Islands in the central Pacific, according to VesselTracking.net.

The 656-foot, 71,000-ton vehicle carrier vessel has a crew size of 24 people; 23 crew members and a pilot. Twenty of the 24 crew members have been safely rescued and looked over by medical personnel.

VesselTracking states that the Golden Ray was built in 2017 by Hyundai Mipo Dockyard and is operated by Hyundai Glovis Co., Ltd.

According to Hyundai Glovis, the Golden Ray is just one of the 61 operation vessels in their fleet.

MORE: Rescue efforts continue on overturned cargo ship in St. Simons Sound, four crew members unaccounted for

All vessel traffic through the Port of Brunswick has been suspended unless approved through the USCG Captain of the Port.

At this time, it is not yet known what led to the ship listing and the cause of the incident is still being investigated.