Implicit in the presumption operable here is the standard to which the operator is held: prudently navigated vessels do not allide with wharfs or moored vessels or aids to navigation. Evidence of compliance with the required standard of care might take the form of evidence of inevitable accident, evidence of superior force, or even evidence negating the happening of the allision. In short, evidence that the operator was free of negligence or that the allision could reasonably have occurred because of factors other than the operator's negligent conduct is necessary. Based upon the evidence in the instant case, the argument that unforeseeable circumstances caused the allision misses the mark.
Source: wiktionary
...contact of a vessel with a stationary object such as an anchored vessel or a pier. In modem practice, “collision” is often used where “allision” was once the preferred term
Source: wiktionary
There have not been any islands of note, or considerable extent, torn and cast off from the continent by earthquakes, or severed from it by the boisterous allision of the sea.
Source: wiktionary
1822 Walter Whiter: Etymologicon universale
...Ainsworth observes on the letter R, that its sound is formed in the upper part of the throat, but so vibrated by a quaver of the tongue, and allision on the teeth, that it makes a sound like the grinning of a dog, whence it is called the canine Letter; but the Romans, on the contrary, give it so soft and lisping a souhd, that in writing they sometimes omitted it...
Source: wiktionary