Thanks Wefalck.
The double bulwark did not exist when the ship was new.
This ship was built in a yard in the Great Lakes in the USA.
We can think that it was made to sail mainly on the lakes and not on the high seas.
Because of the shape of its bow, it is not very well defended against swell and big waves.
So in the beginning there was no second bulwark, there was a simple classic railing.




Canvas in place:


It seems that some ten years later, a second bulwark was installed probably during the second world war. I did not succeed in dating this modification, can during its transformation into a warship.
It allows to protect from wind and sea spray, the forecastle flush deck and the promenade deck probably. It was more robust than the canvas usually placed on the railing.
The SS Delphine renamed Dauntless ( PG-61) during wartime:
http://www.navsource.org/archives/12/09061.htmPatrol Gunboat:
The second Dauntless was designed by H.J. Gielow and built in 1921 and built as the steel-hulled yacht Delphine at a cost of $2,000,000 by the Great Lakes Engine Works, Ecorse, Michigan
Launched 2 April 1921
Burned and sank in the Hudson River, New York in 1926
After four months on the bottom, was raised and rebuilt at cost of $750,000
Struck a rock in Lake Huron in 1940 off Manitoulin Island, Ontario, Canada, but suffered only minor damage.
Acquired by the Navy 21 January 1942
Commissioned USS Dauntless (PG-61), 11 May 1942
Decommissioned 11 May 1946
Struck from the Naval Register 5 June 1946
Transferred to the Maritime Commission for disposal 10 June 1946
Returned to her prewar owner, Anna Dodge Dillman of Grosse Pointe, MI and renamed Delphine
Acquired in 1950 by Horace E. Dodge of Grosse Pointe
Acquired in 1966 by Anna Thomson Dodge of Grosse Pointe
Donated to The People to People Health Foundation in 1967
Sold in 1968 to the Lundeburg Seamanship School of Piney Point, MD and renamed Dauntless
Sold in 1986 to Travel Dynamics of New York City
Sold in 1989 to Sea Sun Cruises, a French - Singapore Co.
Sold in 1997 to a European businessman and towed to Bruges, Belgium for restoration, which lasted from February 1998 to July 2003
Renamed Delphine, she currently operates out of Monaco.
The bulwark is transformed and is in one piece in 1942.
Extensively modified.


The Dauntless after war:

Today:

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I can't wait to print the first hull sections.
An HD image of the underside of the ship, my Imac took all night to create it. Just for fun, because all this will be inaccessible to the eyes. And it is also on the 1 scale model.
Some elements are missing, like the windlass drive shafts in the middle of the gangway and some sponges... The steam engine of the windlasses is below this deck.
It will be in place soon.
Click twice to enlarge.
