If you're looking for a free version or trial:
Configurable ice zones, ship ice classes, and operations with icebreakers or icebergs.
Features the Seagull 5000 visualization system, which simulates complex sea states, weather, and light conditions (sun/moon phases).
If you are looking for documentation or professional access rather than a pirated version, consider these official channels: NT 5000-5-25 Instructor Manual Eng - Scribd