[Llarry]

The U.S. Navy has given up on oil-fired boilers and steam turbines for years now, but given the long lives of active ships, there are still some in the fleet:

The 6th and 7th fleet flagships (LCCs) = 2 ships (50 years old)
LHD 1-7 (less the poor Bon Homme Richard) = 6 ships
Two sub tenders (ASs) = 2 ships
Which is a total of ten in the active fleet.

Nowadays, it's nuclear reactors and steam turbines (submarines and CVNs), gas turbines (most surface combatants and the later LHAs/LHDs) and Diesels (LCSs and most other ships). The old Boiler Technician (BT) rating went away almost 30 years ago and now Machinist's Mates (MMs) get the "pleasure" of working with boilers. I was not a snipe, but it can't be much fun working around those hot boilers.

The Military Sealift Command has many ships taken up from commerical service and still has some with boilers and steam turbines as well, including the two large MSC hospital ships (AHs).