The prince is taking part among the Finnish-Swedish crew in the Northern Coasts 2014 (NOCO14) multinational naval exercise hosted by Finland.
The visitors got a glimpse of the prince briefly when the docked naval ship was open to the public.
The prince said he will be involved in the first stage of the strategy.
The main exercise will begin on Monday as the excise will head to the archipelago along the northern side of Åland Islands and the coast of Finland.
It is exciting to take part in the exercise as part of the crew, said the prince.
It the Navy’s main exercise this year.