“…The first such cabled observatories were the 2006 coastal VENUS system (Tunnicliffe et al, 2008) and the regional NEPTUNE observatory operational in 2009 (Barnes et al, 2015;Best et al, 2015), now within Ocean Networks Canada (ONC). Similar observatories, tailored to national, scientific, and geographical needs, have included Japan -DONET and S-net (Kawaguchi et al, 2015;Kanazawa et al, 2016), United States -Ocean Observatories Initiative (OOI) and others (Massion and Raybould, 2006;Kelley et al, 2014;Howe et al, 2015), China (Lu et al, 2015), and Europe (Best et al, 2014;Person et al, 2015). These developments have in turn fostered the evolution of progressively smaller, more precise and reliable sensors (Schaad, 2009;Paros et al, 2012;RBR, 2017;Delory and Pearlman, 2018).…”