SkunkTracker vs CHIEFMATE

SkunkTracker displays live, updating maps of ships and boats. It uses AIS data streams received over WiFi, either from your own dedicated AIS receivers or from public network feeds such as AISHub.net and MarineTraffic.com. AIS (Automatic Identification System) transponders are carried by all large ships, all passenger vessels, and many recreational boats. Note: you need an AIS radio, or access to a public or private AIS feed, to use SkunkTracker. Your boat's AIS transponder may have a network interface already, and if you can connect to the same network you can use that radio. Your radio can be connected via WiFi or via cellular data. If your radio doesn't have a network connection, we recommend a WiFi-RS232 converter, such as the Global Cache WF2SL or the Grid Connect RN370.

CHIEFMATE is a professional maritime navigation companion built for mariners who need tools that keep working when everything else goes dark. WORKS OFFLINE, NO SIGNAL NEEDED Even in airplane mode, far offshore, CHIEFMATE computes celestial navigation entirely on your device: • Sight reduction (intercept method) for the Sun, Moon, planets, and all 57 navigational stars. Enter your sextant altitude and get a line of position. • Sun & twilight: sunrise, sunset, meridian passage (LAN), civil and nautical twilight windows, day length, and sunrise amplitude. • Latitude at noon (LAN) and by Polaris. • STCW / MLC hours of rest compliance. Positions are computed to arcminute accuracy, finer than a sextant resolves, using a built-in solar model and a bundled astronomical ephemeris. No internet, no subscription, no account required for the offline tools. THE FULL PLATFORM WHEN YOU'RE CONNECTED Sign in with your CHIEFMATE account to open the complete platform: charts that work offline, weather routing, electronic logbooks, tides and currents, stability and loading, publications, emergency procedures, and an AI watch assistant. BUILT BY MARINERS, FOR MARINERS CHIEFMATE is one connected workplace: a sight reduction flows into your logbook and plotting sheet automatically. It runs on a rugged shipboard computer, on the desktop, and now in your pocket. Use CHIEFMATE alongside official publications, a paper almanac, and sound judgment. It supports your decisions. It does not replace prudent seamanship or required carriage equipment. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ CHIEFMATE is a product of STEM Maritime Systems LLC.