Dartmoor Evolutions – helicopters from RNAS Yeovilton helicopters were on duty around Dartmoor, flying scores of missions over a weekend to support a massive outdoor challenge involving over 2,000 young people.   SEA KING and LYNX transported food, equipment, people and even a few injured youngsters, as they helped out at the annual Ten Tors challenge, which sees schools, colleges, Scouts, Guides, cadet units from the three Forces converge on Devon for a two day trek, navigating their way around the crags, rocks and tors which pepper this often forbidding environment.