In 1976-77, Tim Severin sought to prove that a voyage like Brendan's was possible. He built himself a curragh and sailed from Ireland to Newfoundland . During the voyage Tim and company saw similarities between the legend and the actual local situation. Near the Faeroe Islands, Severin encountered flocks of seabirds near what could have been Brendan's Paradise of Birds, and they saw playful whales, which could have been the black sea monsters in the legend. The volcanoes of Iceland could have been responsible for the pelting with flaming, foul smelling rocks and the icebergs are indeed towering crystals… Severin proved that it was possible to cross the Atlantic with a curragh, but how did Saint Brendan navigate? …
One theory: he was lucky... but then how did he return to Ireland?
Another theory is that St. Brendan studied the astrological perfect aligned megalithic monuments, such as stone circles and tombs, and created some sort of a navigational aid, coincidentally shaped as a Celtic cross, found all over Ireland... hmmm...
Finally, who was the monk that told him about the Promised Land?
After Brendan’s voyage, he founded several monasteries and befriended likewise travel-mad St. Columba. Brendan died in 577.
Considering his adventurous life, his final words are remarkable: I fear that I shall journey alone, that the way will be dark; I fear the unknown land, the presence of my King and the sentence of my judge.