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Accident Report Detail

 
Tropical Cyclone Information for Mariners

Executive Summary

The National Transportation Safety Board (NTSB) is providing the following information to urge the National Oceanic and Atmospheric Administration (NOAA), the National Weather Service (NWS; a component of NOAA), and the US Coast Guard to take action on the safety recommendations in this report. The recommendations address, in the interest of mariner safety, the development of tropical cyclone information and its availability to mariners. The recommendations derive primarily from factual information gathered during the NTSB’s ongoing investigation into the sinking of cargo vessel El Faro on October 1, 2015.

The factual data revealed that critical tropical cyclone information issued by the NWS is not always available to mariners via well-established broadcast methods. The data also suggest that modifying the way the NWS develops certain tropical cyclone forecasts and advisories could help mariners at sea better understand and respond to tropical cyclones. Further, factual data on the official forecasts for Hurricane Joaquin and other recent tropical cyclones suggest that a new emphasis on improving hurricane forecasts is warranted.

The NTSB has yet to determine the probable cause of, or contributing factors in, El Faro’s sinking. Nevertheless, based on the meteorological facts gathered thus far, plus discussions with the NWS and the Coast Guard, the NTSB makes ten recommendations in this report. Two recommendations are addressed to NOAA, seven to the NWS, and one to the Coast Guard.

Recommendations

As a result of this report, the National Transportation Safety Board makes the following safety recommendations:

To the National Oceanic and Atmospheric Administration:

Develop and implement a plan specifically designed to emphasize improved model performance in forecasting tropical cyclone track and intensity in moderate-shear environments. (M-17-8)

Develop and implement technology that would allow National Weather Service forecasters to quickly sort through large numbers of tropical cyclone forecast model ensembles, identify clusters of solutions among ensemble members, and allow correlation of those clusters against a set of standard parameters. (M-17-9)

To the National Weather Service:

Work with international partners to develop and implement a plan to ensure immediate dissemination to mariners, via Inmarsat-C SafetyNET (and appropriate future technology), of the Intermediate Public Advisories and Tropical Cyclone Updates issued by the National Weather Service, in a manner similar to the current process of disseminating the Tropical Cyclone Forecast/Advisory. (M-17-10)

Modify your directives to ensure, for all tropical cyclones of tropical storm strength or greater within your jurisdiction, that your facilities issue, at the 3-hour interval between regularly scheduled Tropical Cyclone Forecast/Advisories, an Intermediate Public Advisory, a Tropical Cyclone Update, or another product available (or expected to be available) to mariners via Inmarsat-C SafetyNET (and appropriate future technology), and that the product include the coordinates of the current storm center position, maximum sustained surface winds, current movement, and minimum central pressure. (M-17-11)

Modify your directives to ensure that the “next advisory” time in a Tropical Cyclone Forecast/Advisory clearly indicates when to expect the next update of “current” or forecast information for that particular tropical cyclone. (M-17-12) Quantitatively define “significant change” in terms of both the track and intensity of a tropical cyclone to guide the issuance of Special Advisory packages. (M-17-13)

Ensure that tropical cyclone graphic products issued by entities such as the National Hurricane Center, the Central Pacific Hurricane Center, the Guam Weather Forecast Office, the Joint Typhoon Warning Center, and Fleet Weather Center–Norfolk are made available in near-real time via the FTPmail service. (M-17-14)

Allow users to schedule recurring, automated receipt of specific National Weather Service products through an enhanced FTPmail service (and appropriate future technology). (M-17-15)

Develop and implement a plan for soliciting feedback from the marine user community, particularly ship masters, about the accuracy, timeliness, and usability of weather services to mariners. (M-17-16)

To the US Coast Guard:

In collaboration with the National Weather Service, provide timely broadcasts of the Tropical Cyclone Forecast/Advisories, Intermediate Public Advisories, and Tropical Cyclone Updates to mariners in all regions via medium-frequency navigational TELEX (NAVTEX), high-frequency voice broadcasts (HF VOBRA), and high-frequency simplex teletype over radio (HF SITOR), or appropriate radio alternatives (and appropriate future technology). (M-17-17)


Probable Cause

The recommendations derive primarily from factual information gathered during the NTSB’s ongoing investigation into the sinking of cargo vessel El Faro on October 1, 2015.

This report contains no determination of probable cause.


Accident Location:   ,   Bahamas 40 nautical miles northeast of Acklins and Crooked Islands,
Accident Date: 10/1/2015
Accident ID: DCA16MM001

Date Adopted: 6/20/2017
NTSB Number: MSR-17-02
NTIS Number:  

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