Fore and aft stood two cupolas of moderate height, their sides slanting and partly inset with heavy biconvex glass, one reserved for the helmsman steering the Nautilus, the other for the brilliance of the powerful electric beacon lighting his way.
A proa y a popa se elevaban, a escasa altura, dos cabinas de paredes inclinadas y parcialmente cerradas por espesos vidrios lenticulares: la primera, destinada al timonel que dirigía el Nautilus, y la otra, a alojar el potente fanal eléctrico que iluminaba su rumbo.