An airboat brings rescued residents to safety in Ascension Parish, Louisiana, U.S., August 15, 2016. REUTERS/Jonathan Bachman

Workers gather around a reproduction of Benoist airboat at Fantasy of Flight in Polk City, Florida December 26, 2013. Fantasy of Flight founder Kermit Weeks is building the reproduction Benoist airboat to re-enact the historic round-trip flight of Tony Jannus between St. Petersburg and Tampa, Florida 100 years ago. REUTERS/Scott Audette (UNITED STATES - Tags: TRANSPORT SOCIETY) 

A reproduction Benoist airboat sits inside a hanger at Fantasy of Flight in Polk City, Florida December 26, 2013. Fantasy of Flight founder Kermit Weeks is building the reproduction Benoist airboat to re-enact the historic round-trip flight of Tony Jannus between St. Petersburg and Tampa, Florida 100 years ago. REUTERS/Scott Audette (UNITED STATES - Tags: TRANSPORT SOCIETY) 

A reproduction Benoist airboat sits inside a hanger at Fantasy of Flight in Polk City, Florida December 26, 2013. Fantasy of Flight founder Kermit Weeks is building the reproduction Benoist airboat to re-enact the historic round-trip flight of Tony Jannus between St. Petersburg and Tampa, Florida 100 years ago. REUTERS/Scott Audette (UNITED STATES - Tags: TRANSPORT SOCIETY) 

An airboat with U.S. Senator Bill Nelson (D-FL) (R) aboard skims across sawgrass during a hunt for Burmese pythons during a state-sponsored snake hunt, in the Everglades, Florida January 17, 2013. Python Challenge 2013 is a month-long event sponsored by the Florida Fish and Wildlife Conservation Commission offering prizes of $1,500 for the most pythons captured and $1,000 for the longest python. REUTERS/Joe Skipper (UNITED STATES - Tags: SOCIETY ENVIRONMENT ANIMALS POLITICS) 

Men in a Sheriff's Department airboat prepare to go out to assist in the removal of a steel pedestrian bridge in Minot, North Dakota, as a double rainbow is seen in the background following heavy rainfall, and the Souris River spills over levees and dikes June 25, 2011. The bridge was blocking debris and contributing to the erosion of the clay levee. REUTERS/Allen Fredrickson (UNITED STATES - Tags: DISASTER ENVIRONMENT) 

Members of the U.S. Army Corps of Engineers ride in air boats as they open up bays along the Mississippi River to the Bonnet Carre spillway in Norco, Louisiana May 9, 2011. The Mississippi River was approaching record flood levels and forcing area residents from their homes. Officials opened portions of the Bonnet Carre spillway near the refining hub of Norco, Louisiana, to send Mississippi River water to Lake Pontchartrain. REUTERS/Sean Gardner (UNITED STATES - Tags: DISASTER ENVIRONMENT) 

Russian workers riding an airboat clean up an oil slick in the river Kolva near the Russian town of Usinsk in this August 16, 1995 file photo. Russia's track record with oil spills does not inspire confidence. One of the worst spills occurred in August 1994, when the ageing pipeline network in the northern Komi Republic sprang a leak. The oil spill was officially put at 79,000 tonnes, or 585,000 barrels, though independent estimates put it at up to 2 million barrels. At the high end that would have been half as big as BP's 4 million barrel Gulf disaster. Two months after the spill started, heavy rains broke a dam that contained the oil, releasing a massive slick into rivers and across forested tundra near the city of Usinsk. To match Special Report RUSSIA-OIL/ REUTERS/Gennady Galperin/Files (RUSSIA - Tags: DISASTER ENERGY ENVIRONMENT BUSINESS) 

A coast guard air boat transports people evacuated from their home threatened by rising flood waters of the Red River, south of Fargo, North Dakota, March 26, 2009. REUTERS/Eric Miller (UNITED STATES ENVIRONMENT DISASTER) 

Rescuers travel on an airboat over an icy cornfield on their way to check on flood-threatened home owners in the Oxbow housing development near the Red River, south of Fargo, North Dakota, March 25, 2009. REUTERS/Eric Miller (UNITED STATES ENVIRONMENT IMAGE OF THE DAY TOP PICTURE) 

US Republican presidential candidate and former New York City Mayor Rudy Giuliani (R) wife Judith (C) and the Florida Attorney General Bill McCollum (L) return from an airboat tour at Florida Everglades near Fort Lauderdale, Florida January 19, 2008. REUTERS/Peter Andrew Bosch/POOL (UNITED STATES) US PRESIDENTIAL ELECTION CAMPAIGN 2008 (USA) 

US Republican presidential candidate and former New York City Mayor Rudy Giuliani (R) waves next to his wife Judith (C) after an airboat tour at Florida Everglades near Fort Lauderdale, Florida January 19, 2008. REUTERS/Carlos Barria (UNITED STATES) US PRESIDENTIAL ELECTION CAMPAIGN 2008 (USA) 

Search and rescue personnel on airboats search an area of the Florida Everglades May 12 where a ValueJet DC-9 crashed with 109 people aboard after takeoff from Miami International Aiport May 11. No survivors have been found and the wreckage is scattered and buried beneath the grass and muck of the Everglades