May 9, 2008 -- The National Institute for Occupational Safety and Health (NIOSH) has issued a safety advisory regarding the set-up of aerial ladders with a locking waterway. NIOSH is currently investigating an April 8, 2008, fire fighter line-of-duty-death involving an aerial ladder with a locking waterway. This incident highlights the importance of following the manufacturer’s recommendations for aerial ladder operations to ensure the safety of IAFF members.