The craft was visible at different positions for about 20 seconds at a distance of 3 to 4 miles to 4 to 500 feet.

While transiting a vessel across the ocean from Abijan, Ivory Coast to Port of Spain, Trinidad, we noticed an object over the starbord bow, hovering at the horizon app. 
3 miles distant, the object moved quickly to the port bow horizon hovered there for a couple of seconds, the quickly went directly in front of the vessel, hovering at a distance of about 3 or 4 miles.  The object then quickly went those 3 or 4 miles directly in front of the boat, hovering at a hight of 4 or 5 hundred feet for a couple of seconds, then took off the the north at a speed unheard of, totally without a sound.  
The weather was clear skies and no wind, we had a 3 or 4 foot swell from the SE all the way across.  This was the first of our sightings on this crossing and the only one witnessed by all three of us.  The other sighting was described in an earlier posting.  
All sightings were documented on the log and the captain was informed.
One of two seemingly objective, factual, and documentable reports from the same witness.  PD