Royal Navy submarine seen in Gibraltar with silent ‘sub sniffer' kit to track Russians in the Mediterranean The sophisticated system can detect changes in water pressure indicating the passage of other submerged vessels 6 February 2021 • 6:30am The Royal Navy's Trafalgar-class attack submarine HMS Talent arrives in Gibraltar sporting new sensors on either side of the fin and on the bow. Feb 2, 2021. Credit: David M Parody Royal Navy submarines have been fitted with silent ‘sub sniffers’ which can be used to track Russians in the Mediterranean. HMS Talent, one of the Royal Navy’s Trafalgar-class attack submarines, was seen in Gibraltar on Tuesday sporting new equipment on her hull.