As an instructor in the RAF VC10 sim we had to similate the procedure for crew activity prior to ditching.
To save time we wrote a programme which meant the crew would leave Brize for Gander/Goose Bay (I forget). After many faults, during start and T.O which we would tick-off the training sheet, we would re-position the crew half-way across the Atlantic close to a weather ship. The briefing was we would cause numerous engine failures where they would apply the appropriate drills, so we could tick them as complete, then we would leave the crew with only one engine and thus they would carry out the flight side of a ditching drill.
On one occasion this crew were descending on one engine at full power and the Air Eng was dumping fuel as per....when the Capt. said "Stop dumping!".
The VC10 had levelled out at full power! A quick check of the fuel indicated they could still fly and they then established they could make it to the coast of Ireland with the prevailing wind.
As instructors we were flummoxed and, as there was another training session later, we needed get this one finished so we reversed the tailwind
However, after establishing that the computer and the condition were accurate we reviewed our training to include the possibility of flying on one engine to a better location to land or ditch.
Amazing Aircraft.