Having worked with all types of engineer, the Army and the RAF have the most suss, the army guys had to think on their feet in the field, the RAF had superior training. Matelots seem to be power crazy know-nothing Tiffs or brain-dead fish-heads. A personal opinion but borne out by 10 years of ex-military experience. (A fiver to the first punter to guess which service I served my apprentiship in!)