The CCGS Alert was built with reversing Fairbanks Morris, gearbox and CPP. Those engines were actually quite interesting in that they were also fitted with blowers and turbochargers. The blowers supplied air at low RPM. As a result the engines had a lot of stuff hanging off of them.
The Alert was sold and was renamed Ocean Alert. I happened to run across a post on another site where it was stated that the ship had suffered engine seizures after overhaul. I'm willing to bet they had overhauled the LO pumps incorrectly.
The old Thomas Carleton was direct drive if I remember correctly as well with reversing FM. She was decommissioned and purchased by Sea Shepard and renamed the Cleveland Amory. They painted her black, loaded one barrel of engine oil and headed out the harbour for the seal hunt. The ship suffered an engine failure on the way out and was reduced to one shaft. The thing with FM was was they would run with the crankshafts out of timing, they'd leak like a sieve, but the engineers had to know something to keep them going.
The Provo had reversing Mirlees, oil clutches and CPP. The engines never were reversed, so when the engines were rebuilt in the early 90s, the reverse camshafts were switched from one engine to the other as one engine always run in the opposite direction. For years before, the fuel pumps had to have the stroke adjusted to make up for wear in the cam lobe.
It's funny, looking back, at some of the decisions made in the late 60s and early 70s. I dealt with a ship with a gearbox fitted with babbit bearings. The L&S gearbox had been designed for ball bearings but someone didn't trust that new-fangled technology. The problem was by 2006, pouring and scraping of babbit bearings was a bit of a lost art. Nevermind having 2 of the only gearboxes in existence.