143. Refuelling the "daily tank".
Once a day, as I understand it, the daily (overhead) tank in the engine room had to have fuel-oil pumped into it from the saddle-tanks. This could be assumed to be necessary at some point in each game as a one-off task for the engine room players. As the fuel oil in the saddle tanks was displaced by sea-water, this also necessarily changed the trim of the boat, so this task would also add some much needed extra work for the dive-officer, who would have to retrim the boat on the next dive after the fuel-transfer was made.
Ideally, perhaps, each game would start with a random amount of fuel remaining in the daily-tank, meaning that factoring in when this was done would be something for the captain/chief engineer to think about. Accelerated use of fuel from the daily tank would help in this regard, so that the full "daily tank" exhausts in circa 2.5 hours, meaning that in a 3 hour game, at some point, it'll need to be done. One could argue that this would be done prior to nearing the convoy, but as our "3 TOI games" are considered to be representing many hours, rather than just 3 it actually takes us, that it is therefore something that could be included as a game mechanic. It would also add considerable amusement value when the boat comes to a halt because one "ran out of gas"!
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