I took the liberty of harvesting Roy Australia's image which is an excellent illustration (and refutation of the 'head's up' mythology) of the turn-of-the-century gun mount



Also Craig Bennett at The Southern



More infro here https://docs.google.com/View?id=dfg2hmx7_322dfv7jpff

ROY: What is the DAH of your Greener? I'd be happy to attribute the image if you'd e-mail me at revdoc2@cox.net and thanks!