Scale 1:192. Plan shows a profile, decks amd section view, illustrating the armour arrangement, as designed for the Indefatigable class battlecruiser Indefatigable (1909). The title of the plan is 'Armoured Cruiser to be named Indefatigable, General Arrangement of Armour'. Part of the barbettes are covered in tracing showing modifications. A note on the plan states to see the fly tracing for modification. The edge of the plan is torn in places.