Navy’s flawed technology set the USS John McCain up for disaster
In a panic people get tunnel vision. When you design HMI's for a living you have to consider. If my brother, sister, grandmother was using this system during an emergency could we guide them to make the right decisions.The fact that the prop controls could be split but the UI would not gray out the sliders on the screens that did not have control is a poor user interface design choice. If the controls only appeared "active" on the screen they were transferred too this could have made things much more simple.The fact that the mushroom button for emergency steering yanked control to wherever it was pressed- this should have displayed a red on black box. Emergency Override called from X Station.The issues with the navigation system are a whole other bag of worms- who knows what the mess was there.Disclosure, I have done HMI design and install in production systems for manufacturing, chemical and warehousing operations. I have never built anything for a ship or vehicle. So I may be speaking total stupid to someone in that industry. I would love to hear someone from that market sector drop in and talk about how or why the HMI was setup like this.Sounds like this system was sub-contracted to the lowest bidder and pushed out without enough testing.