The BBC asked Suez-experienced mariners about this, and one said that ships are piloted through the canal, in fact have to take on a "canal crew" whose actual tasks apart from that of the pilot on the bridge, appear rather vague.
So I can't imagine this was a case of "someone falling asleep at the wheel" (or whatever is used now – it's not usually any sort of wheel) despite as they said, it being a very monotonous journey.
Nor would I believe the helmsman was untrained, inexperienced and unlikely to understand the captain's language, having helped bring the vessel right round from Holland on this voyage at least.
The thought has just occurred to me though, is using the side-thrusters banned in the canal, for obvious reasons?
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The Suez Canal is stated as the giving the shortest distance between SE Asia and Europe. If as projected, the Arctic becomes navigable for much of the year, would that be shorter still? There is a shipping-lane right along the Siberian coast, but it has to be kept open by ice-breakers. A "plan" map in my atlas, of the Arctic, set me wondering if any near-Great Circle might open through the Bering Strait, joining NW Europe with SE Asia and the Antipodes.