AIS Radar vs NavLink US

AIS Radar displays AIS (Automatic Identification System) data received from marine AIS transponders/receivers such as the ExNC 101, Weatherdock easyAIS or Digital Yacht, over a WiFi network. For AIS devices without built-in WiFi support, an external serial-to-WiFi adapter such as the SEAMate1A® Lite, the Brookhouse iMux, the Roving Networks RN-370 or the Digi Connect® Wi-SP can be used. Alternatively, the application can display AIS data received from public internet AIS feeds such as the San Francisco Exploratorium. IMPORTANT: Please note that you will need to have an AIS transponder or receiver device capable of sending AIS data over a WiFi connection. Please see the Support Website for information regarding supported devices and setup tips. Features include: * Radar PPI-like display of AIS targets with course/heading and speed information. * Selectable display range. * Symbols for different targets (vessels with AIS class A and class B transponders, SAR aircraft and navigation aids). * Computes closest point of approach (CPA) and time to closest point of approach (TCPA) for AIS targets. * CPA/TCPA warning: The app will warn if the CPA (distance) or TCPA (in minutes) of another vessel is below a specified minimum. * Tap to select targets, double-tap to display detailed information about selected targets. * Pinch gestures and +/- buttons to change display range. * Different radar display modes: Heading Up, Course Up and North Up. * Optionally hide slow moving (or non-moving) targets from Radar view. * List and detail views for AIS targets, displaying all available information about a target in clear form. * Viewer for AIS safety-related broadcast messages. * Supports iPhone and iPad, in portrait or landscape orientation. * AIS/NMEA data can be received via a TCP connection or UDP. DISCLAIMER: This application is no replacement for professional marine equipment. Always adhere to the principles of good seamanship and use proper caution and common sense when commanding a ship.

Marine Navigation App that turns your Apple Device in to a full function chart plotter. Features include: · Realtime GPS position plotted on Marine charts derived from NOAA data (Vector (ENC) & Raster (RNC)) · AIS overlay when connected to compatible wireless AIS system · Waypoints & routes with full route editing and planning function · Position, COG, SOG, VMG, bearing, distance & ETA displays · Configurable chart layers · HorizonView overlays navaid and targets onto iPad/Phone camera display · Automatic free chart updates included for 1 year · Weather buoy data · A-B chart ruler for quick & easy bearing and distance measurement · All NOAA US charts are included in the price · Optional in-app purchase of CA charts AIS Functionality When connected to an AIS system via a wireless NMEA link, NavLink will provide a real time overlay of AIS targets and CPA and TCPA alarms. Internet AIS requires Boat Beacon app HorizonView Overlay chart & AIS objects on the iPhone or iPad camera image to create an augmented HorizonView display, that makes Nav-Aid & vessel identification simple and reliable Plan & sail routes Instant route and waypoint creation by tapping on screen. Route reverse function and route overview with inter-leg bearing and distance. Share your routes via dropbox and email with other users NavLink Charting NavLink utilises the latest S57 based NOAA digital mapping & features automatic free updates for 1 year. With vector mapping, you can manage your layers of data to de-clutter the screen or maximise information. NavLink supports all key charting feature such as buoys, lights, bridges, depth contours, spot depths, depth contours, anchorage & military areas, weather buoys Interfacing NavLink is compatible with all Digital Yacht's wireless NMEA devices such as the iAIS, WLN10, WLN10HS, NavLink, iNavHub & PilotLink that stream wireless AIS data to your Apple device If you have a WiFi-only iPad you will need an external Bluetooth GPS receiver to enable navigation. 3rd Party units are available such as the Garmin Glo. Please note: Continued use of GPS running in the background can dramatically decrease battery life Subscriptions Your purchase includes 12 months free updates to the included chart set. At the end of the 12 month period continued access to ongoing chart updates is available via an in-app purchase. Charts for other regions may also be added to your product via optional in-app purchase. Our in-app purchases are 1 year subscriptions, which automatically renew at the end of the subscription period unless auto-renew is turned off at least 24-hours before the end of the current period. Payment will be charged to your iTunes Account at confirmation of purchase, and will be charged for renewal within 24-hours prior to the end of the current period. Pricing for our 1 year US Charts update subscription is $9.99. Subscriptions may be managed by the iTunes account holder and auto-renewal may be turned off by going to Account Settings after purchase. 
No cancellation of the current subscription is allowed during active subscription period. Privacy policy:- http://seanav.net/digitalyacht/privacy.php Terms and conditions:- http://seanav.net/dyiostsandcs.php Safety Notice NavLink & the charts are intended to be used as an aid to navigation. Only official government charts and notice to mariners contain all of the current information needed for safe navigation. This product's features cannot be relied on to be complete or accurate and may vary locally. It is the Captain's or Boat Owner's responsibility to use official government charts, notice to mariners, caution, sound judgement and proper navigational skill when operating their vessel and using this or any other Digital Yacht product. By purchasing this App, you are accepting the limitations of this app and the NOAA charts. Third Party Licenses and Notices NOTICE: US Marine Charts are derived from official NOAA Electronic Navigational Charts.