【實用交通運輸app】iSailGPS - USA NOAA Marine Charts with Full Navigation|最夯免費app-綠色工廠好玩App

Makes your iPhone or WiFi+Cellular iPad into a high-performance GPS receiver with USA NOAA Raster Nautical Charts! Rated “Best Choice — Excellent” by Practical-Sailor.com

If you are 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.

TRACKS, WAYPOINTS & ROUTES

▶ Record a track. View it on the chart & in a speed graph. Record in the background when using another app or your device is asleep. View date & time of track points.

▶ Mark waypoints with a convenient button on the main chart screen. Refine a waypoint position when you arrive.

▶ Set a quick "Go To" waypoint or a full route and see the course, heading, bearing, direction, distance, cross track error, Velocity Made Good & Estimated Time of Arrival at your destination and intermediate points.

▶ Routes can be built from waypoints or a recorded track

▶ Import and Export GPX files of waypoints, routes & tracks via AirDrop, eMail, Messages, Dropbox, Open In, or iTunes.

USA NOAA RASTER NAUTICAL CHARTS

▶ Forever-free access to all NOAA Raster Nautical Charts for USA waters, with no sign up, no subscription, no in-app purchase required. Download using WiFi or cell service. Charts from our server have a shorter download time, use less of your monthly data allotment, and take up less memory on your iOS device.

▶ Store up to 500 charts to use anytime without cell service.

▶ Switches automatically between downloaded charts as you sail. Choose detailed or overview charts.

▶ Enjoy the high (400 dpi) resolution and what's-all-around detail of the NOAA HD Raster Nautical Charts (RNC). They are a welcome advantage over ENC Vector Charts, which only show a coastline, contour lines, and minimal details.

▶ Print charts overlaid with waypoints, routes & tracks. Share chart images via AirDrop, email, Twitter, Facebook, Messages, Photos, or the Clipboard.

HOW TOS

▶ Tap “Help” in the App

▶ Online Manual on our website

▶ Email developer: lwjames@isailgps.com

RASTER CHARTS VS. VECTOR CHARTS

The National Oceanic & Atmospheric Administration provides both RNC (raster) and ENC (vector) charts. http://www.nauticalcharts.noaa.gov/mcd/learn_diffRNC_ENC.html

The great advantage of the RNC charts used by iSailGPS is the high level of detail produced by professional cartographers that is unobtainable on any vector-based chart. Each is a digital image produced by NOAA of their paper charts.

These RNC Charts differ from computer-drawn vector charts in that each chart covers a specific area, the same way a paper nautical chart does. A new chart is switched to when traveling out of 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 contain multiple panels, each showing a different area or scale. Each digital panel is individually displayed by iSailGPS with a north-up orientation.

Other marine software, which costs far more than iSailGPS, uses these same RNC charts. iSailGPS is priced to make it readily available to all sailors.

DEVICE REQUIREMENTS

● No device requires a cellular data plan to use iSailGPS.

● iPhone 6, 6 Plus, 5s, 5c, 5, 4S, 4 & 3GS, and all WiFi+cellular iPads support full navigation.

● iPod touch (Gen 3 or later) & WiFi-only iPads require an iOS-compatible external GPS receiver to show your location at sea & record tracks. View charts using the iOS device alone.

• GPX file sharing via AirDrop & Messages requires iOS 7.

● Continued use of GPS running in the background can dramatically decrease battery life.