The Batch 2 River-class offshore patrol vessel, covered with various shades of black and grey in abstract shapes, departed from Falmouth in Cornwall on Tuesday morning.
Her iconic lions have also been reapplied in what is Tamar's final big maintenance period before her next overseas operations to the Asia-Pacific.
The dazzle camouflage paint scheme was introduced by the Navy towards the end of the First World War, intended to confuse submariners peering through periscopes, making it hard for them to identify ships.
With the improvement of radar and optical devices, it was phased out by the Royal Navy after 1945 – until now.
Lieutenant Lucy Robus, Executive Officer on board HMS Tamar, explained the reasons behind bringing the paint finish back.
"So this is a nod back to a historical World War Two paint scheme that Tamar's had painted on," Lt Robus said.
"A bit of a recognition of our fastest generation of a peacetime warship since World War Two, but it's also a recognition piece of our enduring missions out in the Far East."
Although the paint finish is not an operational move, the dazzle camouflage is set to be extended across the entire Batch 2 River-class Offshore Patrol Vessel fleet.
In recent weeks HMS Tamar has also been working with commandos and the company Gravity to test out ship boarding's carried out by jet suits.
The commandos were exploring how jet packs can propel someone through the air and land them on a ship as part of the transformation of how Royal Marines might work in the future.
Cover image: HMS Tamar at sea with her dazzle camouflage paint scheme after departing Falmouth, Cornwall.