Rolf Krake has a stronger technical claim to a Key Ships episode than Danmark. It is described as the first turret ship built for a small state, the first seagoing turret ship, and the first to use the Coles-type turret that the Royal Navy would retain for roughly another quarter-century. Danmark had a short career and was not an outstanding design. Its earlier selection reflected the series theme and available preparation time, while Rolf Krake merited a fuller treatment.
Notable Point · 2:31-2:57
Why Rolf Krake matters in turret-ship history
Rolf Krake's seagoing Coles-type turret arrangement gives it a stronger technical claim to naval significance than the short-lived Danmark.