Fatigue a major factor in marine casualties
WASHINGTON (August 21, 2024) — The pilot of a towing vessel that hit a pier near Saint Rose, Louisiana, last year had fallen asleep, the National Transportation Safety Board said Wednesday.
The pilot of the towing vessel John 3:16 was experiencing the effects of fatigue during his watch on Sept. 12, 2023, while navigating the Lower Mississippi River. NTSB investigators concluded the pilot had less than two hours of continuous sleep before taking the watch, and likely received less than five hours of sleep combined over the two days before striking the pier.
“A sleep deficit of as little as two hours can result in acute sleep loss and associated performance decrements, including decreased attention, slower reaction time, reduced vigilance, poor decision-making, and an inability to stay awake,” investigators found.
Fatigue is often a factor in marine casualties investigated by the NTSB.
“Fatigue affects all aspects of human performance, including decision-making, alertness, and reaction time, all of which affect a mariner’s ability to safely navigate a vessel,” investigators said. “Mariners should understand the performance effects of sleep loss and recognize the dangers of working on board a vessel while fatigued.”
Individuals typically require eight hours of quality sleep each 24-hour period to avoid the performance effects of fatigue.
“Obtaining quality, uninterrupted sleep on board a vessel is often challenging due to shipboard environmental factors and external distractions such as cell phones,” investigators said. “It is important that mariners get enough sleep during each off-watch period, so they remain alert when assuming watch.”
The final cost to repair the towing vessel and pier was $285,441.
Marine Investigation Report 24-22 is available online.
To report an incident/accident or if you are a public safety agency, please call 1-844-373-9922 or 202-314-6290 to speak to a Watch Officer at the NTSB Response Operations Center (ROC) in Washington, DC (24/7).
