Shetland coastguard rescues 2 Norwegian yachtsmen from their sinking sailing boat (yacht) Serenity . We heard the yachtsmen asking for assistance on vhf channel 16 we on our fishing boat Budding Rose spoke to Shetland coastguard and organised the rescue .We arrived on scene as the rescue was taking place as you can see by the video . We tried to save the yacht but it was too full of water and sadly sank . We don’t know what caused the ingress of water as we were never told by the yachtsmen and had no feed back from them after they were rescued .