  In this decade, the amount of (industrial) Internet of Things devices will
increase tremendously. Today, there exist no common standards for
interconnection, observation, or the monitoring of these devices. In context of
the German "Industrie 4.0" strategy the Reference Architectural Model Industry
4.0 (RAMI 4.0) was introduced to connect different aspects of this rapid
development. The idea is to let different stakeholders of these products speak
and understand the same terminology. In this paper, we present an approach
using Digital Twins to prototype different layers along the axis of the RAMI
4.0, by the example of an autonomous ocean observation system developed in the
project ARCHES.
