Saving you the Google search:
Shipwreck #1:
Location: San Ignacio
Map Coordinates: 378, 769
Shipwreck #2:
Location: Petite Caverne
Map Coordinates: 901, 264
Shipwreck #3:
Location: Jiguey
Map Coordinates: 564, 539
Shipwreck #4:
Location: Atocha
Map Coordinates: 632, 661
Shipwreck #5:
Location: Black Trench
Map Coordinates: 221, 449
Shipwreck #6:
Location: San Juan
Map Coordinates: 480, 486
Shipwreck #7:
Location: Devil’s Eyes Cave
Map Coordinates: 487, 356
Shipwreck #8:
Location: Anotto Bay
Map Coordinates: 622, 276
Shipwreck #9:
Location: Ambergris Key
Map Coordinates: 55, 177
Shipwreck #10:
Location: The Blue Hole
Map Coordinates: 470, 170
Shipwreck #11:
Location: Kabah Ruins
Map Coordinates: 768, 144
Shipwreck #12:
Location: La Concepcion Shipwreck
Map Coordinates: 180, 296
Shipwreck #13:
Location: Antocha
Map Coordinates: 629, 661
To get this trophy, you do not have to get all of the items at each location, you have to dock at each one. Easy enough.