Seametrix serves over 30,000 ports and terminals, offering fully customisable sea routing combinations with the most accurate sea distance results by far. Rhumbline & Great-Circle navigation methods are calculated on the fly by different servers, providing our users with real-world nautical distances by sea. Our voyage estimation module is made in such a way that makes it easy, quick & sleek to work with. By fully modifying your desired sea routing, you can have your customised itinerary exported to our voyage estimation module, and accurately estimate sea freights, voyage costs and ship expenses, in less than a minute! Seametrix offers by far the most detailed and accurate sea distances and sea routing API, with a lot of navigational parametirizations, such as Great-Circle and Rhumbline Navigation, SECA avoidance, Piracy avoidance, many On/Off passages, Indonesian Archipelagic Sea Lanes Compliance, & usage of either ports or co-ordinates.