Mid 90's. Spent a lovely weekend below the waterline on a frigate updating the ship's maintenance system with a new data picture of its systems. All went wonderfully well and I walked ashore late afternoon on Sunday and flew back to my home city. Fast forward to 4pm Monday and we get a call from the ship at sea saying the maintenance system no longer functioned: get your butt out here and unf*ck it. So, in the car, 3 hours drive to where the ship anchored for the night, RHIB ride out to the ship, up the rope ladder, about 10PM... fix it, you have until 6AM or you are sailing with us (for a week). That, my friends, is great motivation to work fast. To cap it off, there was a small fuel leak in the space outside the computer room: wonderful aroma to deal with. Tried to work out the obscure linkage between existing maintenance jobs and the system description that was causing the issue. Ultimately had to roll the database back to the pre-update state. Off the ship at 6 along with many bags of oil-soaked rags used on the fuel leak. Ship lost a few days of data and a day at sea: captain not happy... and we had to do the whole exercise again later.
Tape for data, $100, Airfare and and accommodation, $600, warship all at sea, priceless.
Not entirely my doing (what is these days) but I was the man that delivered the fun. No names, no pack drill over this.