Scott C Waring posted his discovery on website ufosightingsdaily.com which usually features details of alleged UFO or alien sightings.
The alien chaser highlighted three dark, boat-shaped objects in a shallow area off the coast of Costa Verde, Mexico.
He posted today: “You know me… always searchings for the hidden mysteries of life.
“Well today I stumbled upon something thats not a UFO, but is still absolutely amazing due to its size.”
The first alleged wreck was 138 metres long, according to Mr Waring – more than half the length of the Titanic which was 269 metres in length.
He said: “I found an old shipwreck off Mexico… this one is huge!
“Its 138 meters across according to Google Ruler. The detail is outstanding.
“Oh, and by the way, it is a treasure – 138 metres of iron is roughly $10 million plus recycled.
“Let alone the other artefacts it must still have on it.
“It’s not a freighter because it’s thin along its ends, more like an old battle ship. I researched old sunken ships in the area there, but couldn’t find any that match.”
Mr Waring said he found a second smaller ship of about 61 meters across that he estimated had a wooden hull, to the north west of the larger one.
He said: “It’s on the same island as the first ship, but is on opposite side.”
And to the south west of the larger one, he believes to have found the remains of a 12-metre long fishing boat.
So has Mr waring found some undiscovered shipwrecks on Google Earth?
Sceptics would argue it could just be the effects of pareidolia, when the brain tricks the eyes into seeing familiar objects or shapes such as faces or animals in textures or patterns like clouds or rock surfaces.