PolarView NS 3.0.8 for Mac was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this app available.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. The actual developer of this free software for Mac is Polar Navy. PolarView NS for Mac lies within Lifestyle Tools, more precisely Travel.
From the developer:
PolarView NS is a complete user friendly on-board marine navigation system. It is available for Apple Mac OS X, Microsoft Windows and Linux operating systems. PolarView NS combines free marine chart planning, tides and weather with live GPS navigation and AIS capabilities. It supports ENC charts in S57 format (available from NOAA), raster charts in BSB format, as well as world wide standard S63 vector charts.
You may want to check out more software for Mac, such as PolarView, NS Wallet or Unit Converter | NS, which might be similar to PolarView NS.