surface snorting
n.β Β«Scores of Sydneysiders woke to the sight of thick white smoke coming from a Collins-class submarine off Sydneyβs northern beaches this morning, but their fears of a fire were unfoundedβit was just the ageing subβs batteries recharging.…A Defence Department spokeswoman said the smoke was not the result of a fire or terrorist attack, but a standard procedure called surface snorting. “Surface snorting is a standard operation.”Β» ββSnort what they thought it was” by Paul Bibby Sydney Morning Herald (Australia) Jan. 25, 2008. (source: Double-Tongued Dictionary)