Nautical Charts, Books, Navigation Software & Marine Supplies
Welcome to Maryland Nautical Sales where you can purchase nautical charts, books and other navigational resources at 10 – 40% off.
Founded in 1949, Maryland Nautical Sales is one of the largest nautical chart agents in the United States. We have in stock a worldwide selection of nautical charts (electronic & paper), books, navigation software and marine supplies. As a supplier of worldwide charts (corrected up-to-date) and publications of the U.K. Hydrographic Office (British Admiralty) since 1987, Maryland Nautical was granted its “International Admiralty Chart Agent” status by the U.K.H.O. in 1999. We are also an ISO 9001 Registered Firm.
My “GPS Anti Spoof” app has been released on the Android app store (Google Play Store). The app does everything. Shoot the Sun (or Moon, planet, star) with your sextant and directly compare with the displayed altitude in the app. No calculations / no paperwork. It’s great for sextant training –you get instant feedback. And it easily detects GPS spoofing, if you’re worried about pirates and that sort of thing! Unlike nearly all other available apps and software, this app also incorporates the deflection of the vertical, which can throw off your sights by more than one minute of arc near many islands. The app is dead-on accurate. Find it in the Google Play store here. The basic version is free. There’s also a paid “pro” version. The iOS version is on the way. The Apple approval process is notoriously slow, but that’s how they keep the world safe from security threats, right? Here’s the pdf of my Navigation Symposium presentation on this concept: