I thought I should clarify the point about the water. Salt water is heavier than fresh water so the container should stay relatively close to the surface even if it's full. However, if it is in an a barrel any pushing or pulling is probably going to cause water to ride over the surface and cause it to submerge somewhat.

The same goes with the Fuel. Depending on type, it will more than likely be lighter than saltwater.

Either way, both will act like a sea anchor and make that mile of swimming rough.

25 liters of water is about 6.6 gallons, so a container big enough to carry that is going to cause a lot of drag in the water. If you add the 2.6 gallon container of fuel, and other equipment as well...

Anyway, I guess the point I'm trying to make is that this seems to be set up as a pretty tricky question if you think about the logistics.

I'm assuming the boat is going down faster than it would take to improvise a raft.

Can you provide the list in the form of an essay with different scenarios? LOL