What mark is associated with the Viking aircraft?

The Viking aircraft, specifically the de Havilland Canada DHC-6 Twin Otter, is associated with the mark T1. This designation reflects the specific model and its role within the RAF. The T1 denotes a training variant, which is a common classification for aircraft used primarily in a training capacity.

In the context of military aviation, marks are significant as they provide information about the variant of an aircraft, including modifications or intended use. In the case of the Viking, the T1 mark indicates its adaptation for training purposes and specifies the version used by the RAF.

Understanding these designations is crucial for identifying the aircraft and its operational role, which can vary widely among different marks.