Hardhat includes the following modules:

Waves: compute wave (spectral) parameters
Statistics: compute basic statistics
Filter: high-, low- or band-pass time series
Cross: compute cross-spectrum
Transport: compute bed load and suspended load sand transport
Direction: compute wave direction per frequency
Formula: compute new time series based on a formula given by the user
Correlation: compute linear and rank order correlation coefficient
Sort: sort time series in ascending order and compute percentile
DateBurst: convert date and time to burst number and vice versa
Split: split and calibrate FSF file
Calibration: calibrate raw data
R4: convert Ascii file to R4
Ascii: convert FSF or R4 file to Ascii
Excel: read file into Excel worksheet