Oakland News Online Blog – vlog by Zennie62 YouTube. OaklandNewsOnline.com is the original news site for this content. At 171 metres long, the USS Pennsylvania is the biggest submarine in the US Navy. It can dive deeper than a thousand feet, sail for 20 years without refuelling, and remain submerg ed for up to 6 months. ... Read moreThe post Submarines – Extreme Technology – Big Bigger Biggest appeared first on Oakland News | Oakland News Online. ...read more read less