One of the team was on Flyingdales Moor practising navigation skills on Monday when he came across the artefact in an area which was used as a gunnery range during the war.
A photograph was sent to North Yorkshire Police who in turn called out a detachment from 11 Ordnance Disposal and Search Regiment, Catterick.
The search and rescue team escorted two police officers to the scene who remained with the relic until the explosive ordnance disposal team arrived and arranged safe disposal.
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