Intervalometer : An electronic device mounted in an aircraft which actuates the compartment doors(s) singly, or multiple doors simultaneously or in sequence, to produce the desired coverage level and line length
The Canadian Interagency Forest Fire Centre (CIFFC), Glossary of Forest Fire Management Terms, Manitoba, Canada 2003. http://bcwildfire.ca/mediaroom/Backgrounders/2003_ Fire_Glossary.pdf, (For Fr - Canad) {474}