Here are some links to GPS locations provided by the State Of Florida for reefs and wrecks off Hernando Pinellas and Pasco Counties.
http://www.electricbluefishing.com/eb_sub_menu/shipwreck_list_of_florida.htm
http://www.floridagofishing.com/reefs/cw-reefs-pasco-county.htmlhttp:
//www.floridagofishing.com/reefs/cw-reefs-hernando-county.html
http://www.floridagofishing.com/reefs/cw-reefs-pinellas-county.html
http://www.pinellascounty.org/reef/pdf/tarpon-springs.pdf
Here are some GPS Locations provided by Mike Kaplan
Pasco 1 28.15.148N 082.57.394W
Pasco 3 28.11.500N 083.03.560W
Richardson Reef 28.31.480N 082.55.060W
Tank 4 28.17.735N 083.01.123W
Tank 8 28.17.641N 083.01.086W
Tank 3 28.17.000N 083.01.000W
R.J. Thompson 28.18.590N 083.14.687W
Hudson Rocks 28.22.360N 082.55.140W
Hudson Reef North 28.22.480N 082.56.990W
Pasco 4 28.22.241N 082.56.999W
Pasco 2 28.18.050N 083.00.957W