SEAiq 5.0.1 for Mac can be downloaded from our website for free. This Mac app is an intellectual property of Sakhalin LLC. The software lies within Education Tools, more precisely Science.
From the developer:
EAiq is a full-featured marine navigation application. It allows you to load your own charts in a variety of standard formats, including: S-57, S-63, iENC, BSB, and KAP. The tool also has the ability to download charts automatically from NOAA for the USA and download raster charts for free based on satellite imagery.
You may want to check out more Mac applications, such as Genealogy Pro, sciatrope or MicroWorlds EX, which might be similar to SEAiq.