The ice service at the German Federal Maritime and Hydrographic Agency and its predecessors has been committed to the safety and easiness of ship navigation for more than 100 years. Within this paper, an overview of the operational products issued by the German ice service on a daily to weekly basis throughout the northern hemisphere winter season is given. These comprise written reports, ice charts, NAVTEX messages, and messages via the Global Telecommunication System to inform about the sea ice situation in German coastal waters, the Baltic Sea, and worldwide. Furthermore, the ice service has systematically collected ice observation data along the German North Sea and Baltic Sea coast since the winter of 1896/1897. The history of the German ice service is presented to put the sea ice data into context of the observation technologies used in the course of the existence of the ice service. These long-term observations enable climatological analyses of the sea ice cover in German coastal waters necessary for the safe operation of offshore infrastructure. An evaluation of the data shows a recent decline in sea ice occurrence in the Baltic Sea and German Bight. Current work is ongoing to preserve more of the historic data in digital form and also to transform the products to conform to modern standards in digital technologies and interactive solutions for the customers.

中文翻译：

---

有关可用海冰产品以及德国冰服务当前和未来活动的信息


德国联邦海事和水道测量局及其前身的冰区服务部门 100 多年来一直致力于船舶航行的安全性和便利性。本文概述了德国冰务局在整个北半球冬季每天到每周发布的运营产品。其中包括书面报告、冰图、NAVTEX 消息以及通过全球电信系统发送的消息，以通报德国沿海水域、波罗的海和世界各地的海冰情况。此外，自1896/1897年冬季以来，冰局系统地收集了德国北海和波罗的海沿岸的冰观测数据。介绍了德国冰区服务的历史，将海冰数据置于冰区服务存在过程中使用的观测技术的背景下。这些长期观测能够对德国沿海水域的海冰覆盖进行气候学分析，这对于海上基础设施的安全运行至关重要。对数据的评估显示，最近波罗的海和德国湾的海冰出现量有所减少。当前的工作正在进行中，以数字形式保存更多历史数据，并对产品进行改造，以符合数字技术和客户交互式解决方案的现代标准。