HICO at LSI
Princess Cays
Panchromatic 
PAN-sharpened
CASI  HYPERION
WV2  OLI
4SM vs ALUT
4SM vs DigitalGlobe
From raw data to bottom typing:
it works

1 - NO NEED for field data, nor for atmospheric correction
2 - this is demonstrated in this website, using a variety of hyper/multi spectral data
 

1 - homogeneous water body and atmosphere
2 - some coverage of optically deep water
3 - some coverage of dry land
 

1 - the precision on estimated depth is found wanting, because the noise-equivalent change in radiance  of accessible data is too high for shallow water column correction work 

2 - radiance data should be preprocessed by the provider at level 1 in order to improve S/N ratio
3 - exponential decay: the deeper/darker the bottom, the poorer the performances
 

I keep digging
until suitable data
become available