Yes this was a great addition P3D, I was used in the development and testing of the Milviz Corsair, and rather essential to that project!
For the ship modelers out there, Any ship pouring out black smoke from the stacks would have the engineering officer standing on the bridge undergoing a rather harsh tirade from the Captain. Blowing the stacks is done periodically but with permission! Night would be good time.
"landlubbers" should understand what "blowing tubes" (not stacks) is. Soot builds up on the collection of heating tubes inside each boiler as fuel is burned, despite best efforts to burn fuel in the most efficient way by controlling fuel-oil mixture. If soot builds up it creates 'hot spots" on tubes which can cause a tube to rupture, which requires boiler shutdown and repair - thus losing full power capability for a considerable length of time.
A more common reason is that, even with even, light soot distribution on boiler water tubes, efficient heat transfer to the water is impaired. Boiler powered ships burn a LOT of fuel - anything to increase fuel efficiency was important. One reason you hear about "Navy showers" and "cold water showers" is that it takes fuel oil to distill salt water - if fuel got critical, these measures would help.
Blowing tubes consists of venting high pressure steam in a controlled fashion within each boiler to clean the soot off, which then goes up the boiler flues along with the normal stack gasses. It could be quite spectacular at times!
From CV-60 through CV-67, 1200 psi "D-Type" boilers were used (8 of them), using very high pressure superheated, or "dry" steam. A rupture in a boiler tube -any one of them -was a big deal to just plug, if possible, let alone repair or replace, typically a shipyard job.
These "oil burners" did not necessarily have all boilers lit off or producing propulsion steam at all times, so bringing up steam from say six of eight to increase speed created a lot of soot buildup due to the rich mixture required for fast buildup, created a lot of internal soot as well as stack smoke from combustion
"Blowing tubes" might be done running downwind between recoveries if flight ops were in progress. The Engineering Officer of the Watch would request permission from the Bridge, the Officer of the Deck would alter course to keep stack gas slightly to starboard to avoid the sulfides settling on parked aircraft. Following the ship's SOP, he would then give permission to "blow tubes". Blowing tubes was a routine, required boiler maintenance/operational procedure.