Do you have a Morse Mark 12 diving helmet you are restoring or would like to know more about it? Offered here is a reprint of original 1978 US Navy Navsea operations and maintenance instructions manual housed in 3 ring binder. This is the full and very detailed manual the government used when servicing the helmet. Every detail about the helmet inside and out is contained in this manual which is hundreds of pages long, perfect reference when restoring a helmet!

US Navy Mark 12 Operations & Maintenance Tech Manual