 The company had its head office in Bodø and main base at Bodø Airport . It cooperated with Widerøe , also based in Bodø , for crews and maintenance services . The aircraft was planned to be stationed on 24 @-@ hour watch , with a reaction time of 30 minutes during daytime and 60 minutes during night . Tests showed that aircraft could be used for spills up to 5 @,@ 000 tonnes ( 4 @,@ 900 long tons ; 5 @,@ 500 short tons ) , depending on the type of oil . The dispersant should ideally be applied two hours after discharge . The dispersant application system developed for the De Havilland of Canada DHC @-@ 6 / 300 Twin Otter aircraft consisted of two 1 @,@ 550 @-@ liter ( 340 imp gal ; 410 U.S. gal ) <unk> chamber tanks for dispersant . The uniqueness of the system on board the aircraft , as it was developed by the operator NFK and Widerøe 's engineering department , was primarily that it was self @-@ contained and propelled by bleed air tapped from one of the two Pratt & Whitney gas turbines on the aircraft , pressurizing the tanks . The arrangement of the tanks gave no change in Center of Gravity during discharge of the dispersant . 
