A Plymouth based warship has been put through her paces exercising with submarines off the coasts of Scotland and Norway.
HMS Portland began her workout by providing the opposition for the final stage of Submarine Command Course or ‘Perisher’ as it is more widely known.
The course gets its nickname from the number of prospective Commanding Officers who have had their submarine careers ended by this gruelling assessment.
On completion of her Perisher commitments, the frigate then travelled across to Norway for Exercise Dynamic Mongoose 15.
This was a 10 day NATO anti-submarine warfare (ASW) exercise which saw Portland working alongside ships, submarines and aircraft from Spain, Turkey, the Netherlands, France, Canada, USA, Denmark, Sweden, Germany, Poland and Norway.
Image: Royal Navy