The Navy’s Here – The Type 23 Frigate LANCASTER and the Fisheries Protection Vessel SEVERN helped prevent a tug, the CHRISFOS XXII from sinking in the English Channel during a dramatic rescue off the Devon coast. Sailors from the two ships struggled in dark, freezing conditions to plug a hole in the damaged hull of the tug and pumped out tonnes of water to save the vessel.     The leak was plugged by hammering wooden wedges into the foot-long gap caused when the vessel the tug was towing crashed into it at Hope's Nose near Torbay.