Great advice PF

However I am a bit mystified by this

(If it was ¾” iron pipe. Early 50’s was copper water lines began replacing ferries.)

I am wondering how copper water lines replace ferries. Can't see people crossing Sydney harbour on a copper pipe ferry. Dunno if they would float that well and I reckon thay would not be near as fast as the hydrofoils or catamarans. Might outpace some of the old monohulls though LOL.

Perhaps a new sort of 'Cuyahoga Moon" LOL