Did you know this about Concrete ?

There are several still "moored" to form the breakwater in Powell River.

Of course not just yachts made from concrete.
In the USA it was common to hear of some wearing boots made from concrete.

In 1976 I joined the MV Atlantic (City) of Reardon Smith a 45,000 ton bulk carrier pretending to be a general cargo carrier. After loading in South Korea the ship had been at the anchorage for 5 months as a floating warehouse we started discharging car inner-tubes, bolts of cloth, lighters, shoes and sundry other items before we could discharge packs of pre-fab offices. Under all this was 30,000 ton of bagged cement which had to be re-bagged down the hold and removed by helicopter until we were allowed alongside. By this time the last cement had been on-board for 9 months. It should be safe now as any buildings will probably have collapsed by now.

#13 What was your port of discharge Ken.

Friend of mine built a 40 footer in ferro. Sailed with him around the Pacific. Yacht designer Bruce Roberts was the go to man for designs. Provided you got a competent plasterer to do the actual plastering it was a good medium. In the 1970s lots of ferro boats in NZ.

Down in Port Melbourne there is a berth where dry cement is bulk loaded.
Driving past one day my dear wife said,

'How do they stop it from going hard on the voyage'??

#16. Well John I hope you never replied, they add bromide to it. :)
Bill

British cement was used in the building of German bunkers during ww1, we sold it to neutral Denmark who sold it to the Germans

Well did the Danes do anything wrong? Trade went on regardless of a war they also traded with the UK.

Hi Graham,
Well, not sure about ships as such....but as others have noted....Yachts certainly...been around for many a year.

There is a site on YT by Martin Zero (Urban & Rural Explorer, based in Manchester.)(Interesting stuff on Railways, mills, canals and all manner of subjects.) He discovered two or three concrete barges in a little creek on the Manchester Ship Canal.

Also, check out Wiki..... The Caissons used in the D-Day Landings (generally referred to as "Mulberry Harbours" which links to the concrete caissons...or "Phoenixes" They could be sunk and then re-floated: Hence their name.)
Maybe it is these that are being used for breakwaters in Canada.....But, some still exist on the beaches in Normandy..... I visited them, and the excellent museum there, many years ago.

My late wife and I "paid off" in Saint-Nazaire ....where the famous "HMS Daring " raid took place of course and home of the U-Boat pens....which we wandered in and out of back in November 1986....Then we hired a car and visited the Normandy Beaches.

Google Earth or Street is excellent for exploring the port of Saint-Nazaire.
Cheers.
Steve.