A ArcGIS.Imagery
B Bing Maps - satellite
E CMap mt DR Seafloor
C CMap mt DR Std
F CMap mt DR Std HRB
D CMap mt DR X
J CMap mt DR X HRB
K CMap mt DR X night
L CMap mt DR X HRB night
T CMap ft DR Std
X CMap ft DR Std HRB
Z CMap ft DR X
H CMap ft DR X HRB
W CMap ft DR Seafloor
G Satellite (Google maps)
O Here.com Hybrid
P Here Sat (wego.here.com)
N Navionics Marine Charts
S Navionics SonarChart(TM)