UFO at sea

I was on a missle cruiser in the navy at the time of the sighting. I was on watch duty at that time. We were in the gulf of mexico when this orrcured. I was looking east and I saw 4 black craft coming out of the ocean.The only thing I herd was the sound of the water coming off of the craft.They moved very quickly. The other wittness saw this also. We both contacted the OD and he told us not to put this in our logs as this might be a black ops  base. But these craft looked like nothing I knew of at the time. At that time we knew nothing of the stealth bomber or the stealth fighter. But these craft made no noise. The looked like triangle. No visable formation lights or any kind of markings that would make them any kind of united states air craft.I herd some of the brige crew in the mess hall make the same kind of statements on seeing the craft. I ask a radar operator if he knew what it could of been. He denied seeing the craft or seeing anything odd that night. I lost contact with the other witness he was moved to another ship that was all they told me.
Witness indicates that the date of the incident is approximate.  We have assigned above an arbitrary date in September 1992.  PD