Did you know this about Concrete ?

[George Adams]

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

[happy daze john in oz]

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

[Ken Atkinson]

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.

[Ivan Cloherty]

#13 What was your port of discharge Ken.

[Allen James Jones]

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.

[happy daze john in oz]

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'??

[Bill Morrison]

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

[Jimmy Hillman]

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

[James Curry]

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

[Steve Singleton]

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.