'Ground' only means 'the places which we agree have zero volts on them', nothing more. So wherever that is, on a ship or an aircraft (or inside an appliance with a  2-core power cable), that is 'ground'.

Best wishes
John Woodgate OOO-Own Opinions Only
J M Woodgate and Associates www.woodjohn.uk
Rayleigh, Essex UK

On 2019-07-08 19:19, [email protected] wrote:
Hello group,

Is there a real ground in a ship?  i.e if a Class I product is used on the board of a ship, does the ground pin actually doing anything? The ship is floating in the ocean and I cannot understand if there is a real ground there or not? Can you guys educate me please?

Thank you
Peter
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