Hello everybody! I don‘t know if this question already has been asked: Is it possible to lock the periscope in relation to own heading? (Example: View is 21 degrees to starboard. When i start turning my boat, I’d like to have a constant angle of view of that 21 degrees). Right now it seems to stay focused on a certain point and therefore the angle of view always changes. A constant direction of view is absolutely necessary for the ausdampfverfahren. Thank you for your help.