Ingrid Horn is a serious Dalarö wreck for experienced cold-water scuba teams. The historic cargo steamer sits in a working fairway south of Stockholm and is normally approached by boat and stern line. Its long, intact hull, dark Baltic water, and traffic-sensitive setting reward careful trim, timing, and a steady pace. The dive feels technical even when the route is simple, because the site asks for controlled buoyancy, good situational awareness, and respect for the fairway.