James McCampbell:Detailed reports and documents
Dec. 16, 1958; Hawk Inlet, Alaska
That diesel engines can be disrupted was probably first observed on a fishing boat plying Hawk Inlet, Alaska on December 16,1968 (Case 3). The UFO had been seen the previous day floating on the water about 1/4 mile away. When it appeared about 70 ft, above the mast, the fisherman radioed-the Coast Guard. About 5 minutes later, .the "boat's power" failed and the radio went dead. An auxiliary diesel generator was barely running but it came back to normal as the UFO flew away. 5 The description of this case is less than explicit but the language would ordinarily be taken to mean that the boat's propulsion system failed. It would be rare, indeed, for a boat with a diesel generator to be powered by other than a diesal engine thereby requiring the storage of two different kinds of fuel. Nevertheless, it is quite clear that the diesal generator malfunctioned, a detail that will be seen in other cases.
articles/UFOs: More Engine Effects [Diesals Too].pdf (James McCampbell, 1985)