One of the most interesting accounts of a sea serpent is that of the HMS Daedalus in 1848. When sailing in the South Atlantic, some 300 miles from the coast of present-day Namibia, officers and crew aboard the ship saw what they described as an enormous serpent swimming with its head four feet above the water and roughly another sixty feet of the creature extending back in the sea. Captain McQuahoe also said that “[The creature] passed rapidly, but so close under our lee quarter, that had it been a man of my acquaintance I should have easily have recognized his features with the naked eye.” According to seven members of the crew, it remained in view for around twenty minutes. Lt. E.A. Drummond recorded the events in his diary the day he observed them and also made sketches of what he saw.
What makes the sighting so unusual is the length of the observation, the number of witnesses and that several Royal Navy officers were among that number. Three professional drawings of the creature, based on the captain’s account, were later published. Sketches made by Lt. Drummond finally turned up in 1977.