I married a woman from the Mexican island of Cozumel, state of Quintana Roo. This was in 1970. My wife an I opened a shop in my relative's restuarant, The Bli'Hi.
Everything comes to Cozumel from the mainland, so my relative and I went into business transporting commerce.
Playa del Carmen is where you catch the ferryboat to Cozumel.
I would haul merchendise to Playa, where my partner would be waiting at the dock with his boat, a 52' deep V rigged to haul chapapote black tar used to pave the new airport. He owned the boat but hired a Captain, Cubano, to work it for him. We would load the cargo on his boat and leave for Cozumel around 7:00 p.m. to 8:00 p.m. Normal crossing time is 90 minutes to 2 hours.
Playa del Carmen: The hired Captain/Cubano and I left from the dock in Playa del Carmen at 7:30 p.m., motored south 15 minutes to Xcaret now, Mayan ruins however in past history. Xcaret was the Mayan seaport used by chieftans to cross to high holy island of Cozumel. From Xcaret, you can catch the ocean current that will take you to Cozumel. Cubano set our course from Xcaret to Cozumel as the sun was going down, the stars were popping up, no moon yet.
Around 8:20 p.m. or 8:30 p.m., near the point of no return, Cuabano was standing in the doorway of the wheelhouse, smoking a cigrette, My partner And I sat on sacks of oranges making small talk. Then the motor died. Even the running lights & cabin went off, they work off batteries.
We began to move cargo so we could get to the motor, while Cubano checked the wiring topside.
Now we come to the sighting. Lights actually, and the lights never came out of the water. First the night changed to day. but brighter than day, under this light there were now shadows, yet the light was under our boat, not over us, or beside us, but under us.
All 3 of us thought at first that a submarine was coming to the surface from right under the boat.
We rushed to look over the side but couldn't really see much because the ocean was vibrating like the inside of a washing machine. The light was real bright yet it didn't hurt our eyes. 15 or 20 seconds past when suddenly the lights shot out from'under us like torpedos. We could see 2 lights but Cubano could see a 3rd one from where he was in the cabin.
The lights darted around under the ocean at high speed for about 1 minute before they were gone.
Cubano hit the starter and the motor jumped to life good as new.
We arrived in Cozumel past midnight.
If you want more of this sighting, about the lost hours, and how I became an expert on UFOs around the Caribbean coastline from Cancún-Cozumel- Tulum-Punta Allen, and how/when/where you to can go to have your own sighting. There are maps and timetables written in stone at the Mayan ruins. If you know how to find and read them.