forward and backward at seaglossary / FORWARD AND BACKWARD AT SEA forward and backward at sea. Marine insurance. From port to port in the course of a voyage, and not merely from one terminus to the other and back. 词条贡献者 资深译员Laura,毕业于一所培养高级翻译以及跨文化事务专家的精英大学,专注翻译各种与美国公司法规有关的法律文件。