i Sail GPS : NOAA USA Charts

i Sail GPS : NOAA USA Charts

By James Associates Inc.

  • Category: Navigation
  • Release Date: 2011-04-29
  • Current Version: 8.2.3
  • Adult Rating: 4+
  • File Size: 13.27 MB
  • Developer: James Associates Inc.
  • Compatibility: Requires iOS 9.3 or later.
Score: 3.5
From 82 Ratings


Your iPhone or iPad becomes a high-performance GPS receiver with USA NOAA Raster Nautical Charts, even where there is no cell signal! Rated “Best Choice — Excellent” by Practical-Sailor.com On the water in a bad storm and your chart plotter just failed? Download this app now. You will have full navigation capabilities to get safely back to port. Better yet, buy iSailGPS today so you will already have it if you find yourself in this situation, even in an area with no cell service. No sign up, ads, subscription, or in-app purchase required, making this less expensive & less hassle than the “free” subscription apps. TRACKS, WAYPOINTS, ROUTES Record a track. View it on the chart and in a speed graph. Record in the background. View time of track points. Mark waypoints by their position on a chart, by tapping a geotagged photo, by projecting from a known point, or by searching place names. Refine a waypoint position when you arrive. Set a quick GoTo waypoint or a full route and see the course (COG), heading (HDG), bearing (BRG), direction, distance, cross track error (XTE), Velocity Made Good (VMG) and Estimated Time of Arrival (ETA) at your destination and intermediate points. Man Overboard (MOB). With one button push, mark your current position & start navigating to it. Create routes using waypoints, recorded tracks, or imported GPX or KML files. Advanced route editing. Import & Export GPX and KML waypoint, route & track files via eMail, Messages, Import With, AirDrop, iCloud Drive, Dropbox or iTunes. Import files using a custom URL scheme. Send KML files to display immediately in Google Earth. USA NOAA RASTER NAUTICAL CHARTS Forever-free access to all NOAA RNC Charts for USA waters. Download using WiFi or cell service. Store up to 750 charts to use anytime at sea without cell service. Charts from our server have a shorter download time & use less of your monthly data allotment. Stitches charts and automatically switches between downloaded charts as you sail. Choose detailed or overview charts. Print and Share map images overlaid with waypoints, routes & tracks. Measure distance between any 2 points. NOAA charts don't include most inland rivers & small lakes. Use our iHikeGPS app for these. HOW TOS Tap Help in the app. Online Manual: isailgps.com Email developer: lwjames@isailgps.com RASTER CHARTS VS. VECTOR CHARTS The National Oceanic & Atmospheric Administration provides both RNC (raster) and ENC (vector) charts. The great advantage of the high resolution RNC charts used by iSailGPS is the high level of detail produced by professional cartographers that is unobtainable on any vector-based chart. ENC Vector Charts only show a coastline, water depth, navigation aids & minimal details. These RNC Charts differ from vector charts in that each chart covers a specific area, just as paper nautical charts do. Switches automatically to a new chart when your boat leaves the area covered by the previous chart. For most locations, there are multiple charts at different scales with different levels of detail & areas of coverage. Paper charts can have multiple panels, each showing a different area or scale. Each digital panel is individually displayed by iSailGPS with a north-up orientation. Other, more expensive over the long run marine software uses these same RNC charts. iSail GPS is priced to make it readily available to all boating enthusiasts. DEVICE REQUIREMENTS No device requires a cellular data plan to use iSailGPS. WiFi+cellular iPad 2 or later, & iPhone 4S or later support full navigation. iPad 2 or later with WiFi-only, & iPod touch (5th gen or later) require an iOS-compatible external GPS receiver to show your location on the water and to record tracks. View charts using the iOS device alone. Continued use of GPS running in the background can dramatically decrease battery life. Winner of the Practical Sailor Editors’ Choice Award. Sailing becomes safer and more fun with iSailGPS!



  • Don’t waste your money

    By Len082
    Useless, doesn’t load charts , really a total waste
  • Says chart for lakes. Nope

    By Dawg1966
    I think we should be able to get our money back when the app developer misleads customers. It states clearly that there are charts for lakes. NOT for the biggest lake in the country. Lake Texoma. I know their are charts, this app just can’t access them. Buyer be ware.
  • Both Planning and at Sea

    By An Oldtime Rep
    The charts are nicely integrated to the user interface making trip planning easy. The planned routes execute well while at sea. My go-to app for coastal navigation.
  • App hangs up

    By Kiloechooo
    Updated app on iPad. No longer works on iPhone. Hangs up during update. Delete, reinstall, won’t reinstall. But fix caused new bugsz
  • Outstanding

    By Wolfeinmaine
    I’ve been using this app for about a year and I am throughly impressed and happy with it.
  • My favorite app

    By DarlingtonJohn
    I have used many apps for marine navigation. I have settled on this beautiful app as my favorite. Did you know that it is one of the only apps in this genre that will work on the iPad1? Not only does it use NOAA charts by our gov't but it can also stitch them together. The documentation is just excellent. I feel that you can become a fan of this application.
  • ISailGPS is GREAT

    By Baflo1251
    Really a very useful app with lots of functionality though not totally intuitive - need to review the instructions. The charts alone make the app worth having. Use extensively while sea kayaking. Strongly recommended
  • Really great

    By JHM44
    I have never written an app review before but now I feel compelled to do so! This app allows free downloading of official nautical charts rom the actual NOAA server so there are no issues with being up to date or inaccurate. It's a great balance between simplicity and functionality - the charts themselves, making waypoints and routes, tracking. That's about it. But when you are cruising that's really all you need. I have a vector-based competitor (iSailor) which is also very high tech and very cool and has more functions by far. I thought I would like it better. But in fact the vector information can be ever so slightly off so I never use it in tight quarters. In fact I've started to use this exclusively instead.
  • Excellent! Add Instrument Panel?

    By careful listener today
    I love iSailGPS! Simple, stable, clear. Upgrade wish: Add an "instrument panel" page, showing just instrument numbers, for use when racing and/or in open ocean: - show: HDG, COG, SOG, DTW, BRG, VMG; use big numerals in vertical list; allow night-mode red numerals - to display: swipe left on instruments at top of My Location display (to return to chart, swipe left on instrument panel).
  • Great app

    By Rafcaste83
    I bought this to rent powerboats in the keys and it has been very reliable. I love the the maps are not an additional cost. Great value for the price