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  • Tags: 1960s

guthrie_rolling_bridge.jpg
The Guthrie Rolling Bridge was invented by Mr. C. T. Guthrie. In 1869 it became a standard feature of many Palmerston Forts being constructed during this time frame. This type of bridge was installed in Fort Camden and remained in operation up until…

https://i.ytimg.com/vi/4Eo7Rmh-WVk/default.jpg
Submarines & Diving playlist: https://www.youtube.com/playlist?list=PL1C388CF94E3C0F45

US Navy Training Film playlist: https://www.youtube.com/playlist?list=PLA40407C12E5E35A7

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