USCGC BENJAMIN DAILEY (WPC-1123). This ship was lost to an in-port fire. Commissioned July 4, 2017, decommissioned September 6, 2022. Photo by Bigshipdriver
The War Zone has an interesting post about the vulnerability of conventionally powered ships during yard periods with a focus on the loss of USS Bonhomme Richard and the contrasting policies applied to nuclear powered ships.
SAN DIEGO (July 12, 2020) The U.S. Navy amphibious assault ship USS Bonhomme Richard (LHD-6) on fire at Naval Base San Diego, California (USA), on 12 July 2020. On the morning of 12 July, a fire was called away aboard the ship while it was moored pier side at Naval Base San Diego. Base and shipboard firefighters responded to the fire. Bonhomme Richard was going through a maintenance availability, which began in 2018. The fire was extinguished on 16 July.
Coast Guard ships are subject to the same hazards and potentially might benefit from the same safeguards.
Chuck Hill's CG Blog 