Laroche, Chantal, Murray Hodgson, Laurel Ritmiller, and Stanley Forshaw. “Audibility of Signals and Alarms in a Coast Guard Environment”. Canadian Acoustics 27, no. 3 (September 1, 1999): 114–115. Accessed October 28, 2021. https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1244.