Over the sea ice field the observations include: sea ice freeboard height and hence sea ice thickness from radar altimetry; sea ice surface temperature and sea ice drift from respectively infrared radiometer and imaging spectrometer under cloud free conditions. (nersc.no)
FEMA offers credits toward flood insurance discounts for communities that require up to 3 feet of freeboard. (houstonchronicle.com)
«Many communities choose to better prepare themselves by adopting higher freeboard elevations or additional safety requirements for new or substantially improved structures, which could lead to reductions in flood insurance.» (sciencedaily.com)