Owen,
In the case of these survivors, I'd hesitate to say the Jones Act is the leading cause. I'd say it has more to do with the fact that the Navy built these boats strong, and they handle well in the rough Pacific. When the Navy started selling off the old WWII yard boats in droves during the 1970's, the fishing industry bought a lot of them. Many have since spent their off time in fresh water, and still have good hulls, so they're kept working. Those that aren't worth keeping are replaced either with newbuilds from local builders or the Gulf Coast, or converted offshore vessels. Believe it or not, several are also still running in eastern Russia, purchased from American owners over the years.
Regards,
Kyle

Owen, ouch! haha
Kyle, some living dinosaurs make interesting viewing... must check out the 'Arctic Enterprise' as well.
Yikes, some history too: Here .
;-)
Rick

Another Jones Act floating dinosaur

Thanks Rick.
I can't say for sure if she's been re-engined, but I would imagine it happened when she was remodeled into a freighter, is not again since.
There's actually a surprising amount of WWII steel and wood still afloat here on Puget Sound. In fact the vessel she's alongside, which has eluded getting a clear photo, is ARCTIC ENTERPRISE, was built late in the war as a C1-M-AV1 type freighter initially used as a US Army transport.
Kind Regards,
Kyle

70 years young, and still earning a crust.
Remarkable shot, remarkable vessel.
I wonder if she has been re-engined?
Nice one Kyle.
Regards, Rick