I was wondering if anyone has tested a Trident under ice in either freshwater or (ideally) saltwater. We’re looking to use a Trident for some exploratory dives/site selection dives under sea ice in Antarctica. This article from 2016 claims that Trident was designed to be used in sub-zero temperatures, and this article from 2017 seems to corroborate that. Has anyone done any field testing? If so, any tips and/or words of caution?