Laytime & demurrage tool
BIMCO 2013 Laytime Definitions calculator with NOR validity gates, seven charter-party forms (Gencon94, Asbatankvoy, ShellVoy6, BPVOY5, NORGRAIN89, SYNACOMEX, AmWelsh), once-on-demurrage, half-rate weather, separate / reversible / averaged modes and holiday calendars for ~250 countries.
Also available as an AI tool. Discover the schema at /api/maritime-calc/tools and invoke via POST /api/maritime-calc/tool with name "calculate_laytime_demurrage". Conforms to the Anthropic tool-use / OpenAI function-calling spec.