I'm Marine Engineering Officer, but because of the nature of ships I'm trined in, Advanced Fire Fighting And Command, Advanced First Aid, Sea Survival and Proficiency in Rescue Boats and craft. Most of our fire training and situations are in enclosed ship mock ups, very small rooms, except engine room where its a couple or few stories with gantries running around it, so watch out for from fire below, large enclosed Class B (Oil) fires are scary as hell and you end up swimming in foam, one time we had to enter through a shaft just big enough to crawl though in BA gear, and I was No. 3 in the team, so third back, in the middle of the shaft tunnel type thing, and i liturally couldn't see anything but foam, would of drowned if i didn't have BA gear!