The Faslane-based minehunter has now arrived in Rosyth on the Scottish east coast for a short logistical stopover.
As part of NATO's Standing Mine Countermeasures Group One, the ship has been patrolling northern European waters, carrying out combined training, dealing with wartime ordnance and generally flying the flag for the alliance.
During the deployment, HMS Blyth sailed more than 4,000 miles, took part in four multinational exercises and visited a number of European countries.
As well as live gunnery exercises near Denmark, the group conducted a hunt for historic ordnance and found two Second World War-era mines which were then neutralised.
The ships also sailed as far east as the small Swedish port of Karlskrona where they took part in exercises with the Swedish navy.
HMS Blyth's Commanding Officer, Lieutenant Commander Peter Ellison, said: "This deployment has helped to demonstrate the Royal Navy's enduring commitment to NATO.
"It has been a great opportunity to work with friends and allies, to learn from each other, and to support maritime security activity in the North and Baltic Seas."
Cover image: HMS Blyth approaches the Forth crossings on her way to Rosyth (Picture: Royal Navy).