I'll stipulate that I have no experience in this matter, so if there were a " Stupid Questions about Shipboard Fore Control " this question belongs there.
Would it not make sense to pre-position a fire truck with lines set up ready to go when major work is being done? You have the base FD, and even if it was just a truck and three guys, it would be there if you needed it. I know there are manning and cost issues, but it seems like a small price to pay vs. a potential total loss.
The defense from fire generally is as follows:
1) Prevention. This is the most significant step. Proper stowage of flammable materials, fix oil leaks, using flame resistant materials in ship's construction, safety precautions and permissions processes for work that creates a fire risk, and most importantly - training, certification, and supervision to make sure those processes are executed.
Pier side this permission resides on two levels: first, the CO. Second, the OIC of the IMA who is supposed to holistically look at risky evolutions scheduled simultaneously on the Safety of Ship Maintenance Item List (SOSMIL). That review is supposed to identify conflicts (like hot work with the suppression system down) and put additional mitigations in place. In the yards it typically resides with the SY and they each have their own processes for certifying the work area and workers.
2) Rapid response(first 5 minutes). In port this is the duty section and typically executed with portable extinguishers while breaking out hoses and donning FFEs for sustained response.
A sobering fact during an upkeep is that the most likely person to find a fire is a civilian worker. Sheer numbers of who's on board. But they're trained to immediately evacuate vice put an extinguisher on it (except hot work fire watches). The biggest impact to losing the Miami was the civilian who smelled smoke pulled the alarm in the space below... By the time personnel responded and realized the fire wasn't there, the actual space was too smoked out to find and fight the fire (EABs tagged out and all SCBAs stowed topside).
3) Sustained response. Using fire hoses and fire teams in FFEs after flashover occurs. Honestly if you get to this point, you're probably screwed. If you're using a topside fire truck, you're
definitely screwed. I doubt that a fire truck standing by topside would have changed anything if the crew couldn't rapidly put out the fire in under 2-3 minutes.
I'm not full up round where fire suppression systems fall in that spectrum since we don't have them outside the galley. My guess is #3.
So aside that a fire truck 24/7 would provide very little gain in preventing another incident like this, civilians aren't trained like Navy. They are trained to minimize the spread; the property when they show up is already considered a total loss. They stay outside unless someone needs rescuing. We're trained to go into the space to try to put out the fire because we can't write off the ship as a loss while at sea. Loss of ship means everyone on it dies.
The civilian FFs at PNSY had never step foot on a sub when the Miami fire happened.
You can put a fire truck up there, but it's like making people walk one way in a supermarket to avoid spreading COVID.