Official SevenCs YouTube Channel. SevenCs GmbH is located in Hamburg, and for decades has been “the Expert” in developing maritime software applications. Global business experience for more than 25 years have led to a reliable product family such as the S-57 and S-100 chart display Kernel, professional navigation software (ORCA Series) and ENC production tools. In addition to software they provide a complete range of complementary services, including training, consultancy, and customer support.