The following underwater shipwrecks are found at the corresponding locations after 
Sequence 6-1 is completed:

Shipwreck        Location
----------------------------------------------------- 
Shipwreck #1  - San Ignacio (coordinates 378, 769).
Shipwreck #2  - Petite Caverne (coordinates 901, 264).
Shipwreck #3  - Jiguey (coordinates 564, 539).
Shipwreck #4  - Atocha (coordinates 632, 661).
Shipwreck #5  - Black Trench (coordinates 221, 449).
Shipwreck #6  - San Juan (coordinates 480, 486).
Shipwreck #7  - Devil's Eyes Cave (coordinates 487, 356).
Shipwreck #8  - Anotto Bay (coordinates 622, 276).
Shipwreck #9  - Ambergris Key (coordinates 55, 177).
Shipwreck #10 - The Blue Hole (coordinates 470, 170).
Shipwreck #11 - Kabah Ruins (coordinates 768, 144).
Shipwreck #12 - La Concepcion Shipwreck (coordinates 180, 296).
Shipwreck #13 - Antocha (coordinates 629, 661).