here is a very good explanation for the choice of words:
Though written as a noun, "Reise" is obviously used as a verb in the song. The phrase "Reise, Reise" is used by seamen as a wake-up call and finds its roots in the Middle High German verb "risen", which meant "to rise" (to which it is obviously related as well). This verb has since died out in New High German, though the noun was retained and came to mean "journey" or "voyage". The verb "reisen" was rederived from the noun "Reise", but now means "to journey" or "to travel". It seems the old meaning has been preserved in this phrase in the seaman's language.
here is a very good explanation for the choice of words: Though written as a noun, "Reise" is obviously used as a verb in the song. The phrase "Reise, Reise" is used by seamen as a wake-up call and finds its roots in the Middle High German verb "risen", which meant "to rise" (to which it is obviously related as well). This verb has since died out in New High German, though the noun was retained and came to mean "journey" or "voyage". The verb "reisen" was rederived from the noun "Reise", but now means "to journey" or "to travel". It seems the old meaning has been preserved in this phrase in the seaman's language.