Prince Harry also cut a birthday cake with a sword and thanked the Marines for their service:
"It's really nice to see you all and know you're having a good time out here. I think most of you would be somewhere else, Salisbury Plain or somewhere miserable, this gives you an opportunity to get out there and use every single day as an experience."
Warrant Officer 1st Class Adrian Shepherd, who has served with CHF for 27 years, said:
"This is the first time His Royal Highness has visited Joint Helicopter Command since becoming Captain General and it is great that he is doing the visit while we're in Norway.
"He was able to get a good look at what we do and how we operate in these harsh conditions. He saw the amount of training that goes into it and why it is so important that we do this exercise every year.
"It is good for the people out here to see their hard work recognised during a significant year for the exercise."
Already as part of Clockwork, 847 Naval Air Squadron (NAS)’s Wildcat Battlefield Reconnaissance Helicopter has carried out underslung load training operations.
Three Mk3A Merlin helicopters from 845 NAS will also fly from Yeovilton over three days to join the exercise.
Once in Norway, engineers work in temperatures as low as -30°C to keep aircraft functioning and aircrew are tested in tasks involving night-time snow landings, mountain landings, troop drills and load lifting.