I thought I would add some more documentation on refueling in the game.
For new players Don Bowen was the games naval team programmer.
Don Bowen post #465:
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The auto-refueling has been tempered a bit. Any TF underway that does not have sufficient total endurance to
complete it's mission will CONSIDER refueling each turn (same as WITP). A check for percentage of total fuel
has been put in to prevent every-day topping off. This means that the TF will refuel the short ranged ships every
few days instead of every day.
Don Bowen post #24:
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There are two issues here.
First, the decision to have MANUAL refueling be fully refuel was by design.
The thought was that a player that ordered refueling wanted to fill'er up. Refuel options were only for automatic refueling,
over which the player used to have no control other than Do Not Refuel. After some discussion, this has been changed (for next Patch).
Manual refueling will obey the TF refuel option - the player is responsible for setting it correctly.
Second, there was an issue in the minimal/tactical refuel calculations. Long story short, the calculations were done at TF level using TF endurance
and TF endurance required. A refuel factor was generated and applied to refueling for all ships in the TF. Neat and simple, and did not work.
The TF endurance already reflected the lowest endurance ship in the TF so every ship ended up getting refueled based on a factor generated
from the lowest endurance ship. And, since the lowest endurance ship's endurance was frequently levels of magnitude below average TF endurance,
refueling factors approached (or reached) 100% refueling. Calculations have been reworked to be ship-by-ship instead of TF endurance based.
Don Bowen post #399:
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I assume SOL means Slightly Out of Luck?
Tankers can not refuel from their fuel cargo at sea. Don't have the fittings.
All ships are allowed to refuel other ships underway from their own bunkers - which is non-historical
but the ability could not be removed for playability reasons.
Don Bowen post #4:
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Having a slow TF follow a fast TF will ALWAYS cause the leading TF to slow down until the
following TF gets within the prescribed follow distance.
To have a replenishment TF rendezvous with a fast carrier TF you may wish
to use either waypoint/refuel or meet/refuel.
If you want to set up an at-sea gas station, move the replenishment TF to some convenient at-sea hex and select remain on station.
Then route the carrier TF to that location in some way. Either manually with remain on station and do the fueling manually
or use waypoints with the refuel option, Which ever works best.
You can also use the meet/refuel option for a single refueling. I think this may also cause slowing of the carrier TF to accomplish the meet.
Meeting is quite complex and how it is handled depends on which TF is closer to the destination of the "met" TF.