WASHINGTON, D.C. — The National Transportation Safety Board Tuesday released the transcript from the El Faro voyage data recorder bridge audio, which was one of five factual reports added Dec. 13 to the agency's investigation docket, as part of its ongoing investigation into the maritime tragedy.

The U.S.-flagged cargo ship, El Faro, sank on the morning of Oct. 1, 2015, off Crooked Island, Bahamas. The ship was sailing with a crew of 33, who are believed to have all perished, and included five Maine Maritime Academy graduates — two from Rockland, one from Windham, one from North Wilton and one from Brooklyn, N.Y.

In addition to the VDR Audio Transcript Group's report, factual reports from the Electronic Data Group, Meteorology Group, Survival Factors Group and Engineering Group were also added to the investigation docket today.

According to the press release:

The Engineering Group Factual Report contains information about the El Faro's machinery system, a description and history of the vessel, maintenance histories for the plant, survey and inspection information, the vessel's safety management system, and information about the training and experience of the El Faro's engineering staff.

The Survival Factors Group Factual Report contains information about the U.S. Coast Guard's search efforts, the El Faro's survival equipment, crew preparedness, lifeboat standards and regulations, and information about distress transmissions.

The Electronic Data Group Factual Report provides a system overview and discussion of data recovered from the El Faro's voyage data recorder and other onboard electronic systems. The ship's voyage data recorder captured 26 hours of data in 11 parameters leading up to the sinking of the vessel. The 11 parameters were:
• Bridge Audio
• Date
• Time
• VDR power supply status
• Position and other GPS data
• Heading
• Course
• Speed
• Rate of Turn
• Wind data
• Automatic Identification System data

The Meteorology Group Factual Report provides information about what meteorological information was available to the El Faro's crew.

The Voyage Data Recorder Audio Transcript Group Factual Report contains the transcript of the discernible and relevant bridge audio captured by the VDR. Members of the group included the NTSB, the U.S. Coast Guard and Tote Services – the owner of El Faro.

The NTSB said it considers the information captured in the VDR's bridge audio recording critical to determining the events leading up to the loss of the El Faro.

According to the release, the bridge audio was characterized as "poor quality" and contains high levels of background noise; however, this is not considered unusual. There were six microphones positioned throughout the El Faro's bridge. Extensive digital audio filtering was necessary to enhance the audio. The entire 26-hour recording was reviewed many times, with some statements reviewed more than 100 times by the VDR audio transcript group to ensure they understood what was being said in the recording.

About 10 hours of audio was determined to be relevant to the investigation and therefore transcribed by the VDR audio transcript group. The transcript required more than 1,100 work hours to complete. The transcript report is more than 500 pages and is the longest transcript ever produced by the NTSB, the agency said.

Following is a summary of the bridge audio transcript, as provided by the NTSB in the release:

• The bridge audio recording began about 5:37 a.m. on Sept. 30, 2015, roughly eight hours after El Faro departed Jacksonville, Fla.

• The first recorded conversation about the forecasted weather was captured the morning of Sept. 30, between the captain and chief mate, who agreed on a course diversion they believed would keep them sufficiently clear of the eye of Hurricane Joaquin. There were multiple conversations regarding weather and route planning throughout the day and evening of Sept. 30.

• The captain departed the bridge at about 8 p.m. on Sept. 30, and returned at about 4:10 a.m. on Oct 1. At about 4:37 a.m. the chief mate received a phone call from the chief engineer regarding the vessel's list and engine oil levels. This appears to be the first recorded conversation about these issues. The information was related to the captain. The alternate chief engineer is heard stating at about 5:12 a.m. that he's never seen the ship with such a list.

• At about 5:43 a.m. the captain takes a phone call and indicates there is a problem in the number three hold of the ship and sends the chief mate to investigate. They discuss suspected flooding over UHF radio, which appears to be the first recorded conversation about a flooding condition on the ship .

• The captain indicates at about 6:13 a.m. that the ship lost propulsion. Numerous conversations are heard throughout the remainder of the recording about the ship's flooding condition, attempts to rectify the ship's list and attempts to regain propulsion.

• The second mate began formatting a Global Maritime Distress and Safety System distress message at about 6:32 a.m., as directed by the captain. At 7:07 a.m. the captain notified Tote Service's designated shoreside representative of the critical situation and that he was preparing to send an electronic distress signal. The captain instructed the second mate to send the distress message at about 7:13 a.m. The captain gave the command to sound the ship's general alarm at about 7:27 a.m. and about two minutes later the second mate exclaimed there were containers in the water and the captain gave the command to sound the abandon ship alarm. About four minutes later the captain relayed over the UHF radio to put the life rafts in the water.

• The bridge audio recording ended at about 7:40 a.m. on Oct. 1, 2015, with the captain and one of the helmsmen still present on the bridge.

Note: The public docket contains only factual information collected by NTSB investigators. The public docket does not provide analysis, findings, recommendations or probable cause determinations, and as such, no conclusions about how or why an accident occurred should be drawn from the docket. Providing the docket affords the public the opportunity to see what information has been gathered about the accident. Any analysis, findings, recommendations, or probable cause determinations related to the accident will be issued by the NTSB at a later date.

Related links:

• Authorities working to recover details, dialogue from recovered 'El Faro' data recorder
• Search for El Faro voyage data recorder pushed to August
• Marine Board investigators told El Faro captain thought he could avoid storm
• NTSB: Specialized equipment needed to recover El Faro voyage data recorder
• NTSB locates voyage data recorder of sunken cargo ship El Faro
• NTSB to resume search for El Faro data recorder
• NTSB to launch second mission to search for El Faro evidence, clues
• Hearing set for U.S. Coast Guard Board of Investigation into El Faro sinking
• El Faro crew from Rockland not among group of 10 to settle with ship's owner TOTE Maritime
• UPDATED: NTSB releases public docket video, photos of El Faro debris field
• Lawsuits filed on behalf of Rockland El Faro crew members
• NTSB learns navigation bridge, data recorder missing from wreckage of sunken El Faro
• Flags in Knox County to half-staff in in honor of El Faro crewman, Dylan Meklin
• NTSB issues update on investigation into sinking of El Faro
• Update: Fifth Maine Maritime graduate among those missing at sea in El Faro sinking
• Flags in Knox County at half mast to honor El Faro second mate, Danielle Randolph