# Pelorus Nav — Navigational chartplotter

> Navigational chartplotter (iPhone/iPad app by Gary Oberbrunner.)

- Source: https://appshunter.io/ios/app/pelorus-nav/id6781294138 (this page in markdown: same URL + `.md`)
- Developer: [Gary Oberbrunner](https://appshunter.io/developer/6781294140)
- Category: Navigation, Travel
- Price: Free
- Age rating: 4+
- Requires: iOS 15.0 · 9 MB
- Languages: American English
- Released: 2026-10-27
- Data updated: 2026-10-29

## What is Pelorus Nav?

Pelorus Nav is a free, open-source marine chartplotter for iPhone and iPad. It draws official NOAA electronic navigational charts as crisp vector charts, using the standard IHO S-52 symbology of professional chartplotters. Once you've downloaded a region, everything works offline, far from cell service.

No account, no ads, no subscriptions, no tracking. Your routes, tracks and position stay on your device.

CHARTS
• Official NOAA vector charts (ENC) for US coastal waters, the Great Lakes, Puerto Rico and the US Virgin Islands, and Hawaii, in downloadable regions
• Kept current: NOAA's updates are checked nightly, and the app tells you when a downloaded region has newer charts
• Seamless multi-scale quilting, with more detail appearing as you zoom in
• Day, Dusk, Night and E-ink themes in the official S-52 color palettes
• Depth shading set to your boat's draft, with a safety contour
• Light sectors, charted currents, adjustable detail level and text size
• Offline street map for land detail near shore
• Tap any buoy, light, wreck or depth area to see its details
• Find harbors, islands, buoys and lights by name, even offline

NAVIGATION
• Tap to build routes, drag to edit, snap to existing waypoints, reverse and extend
• Follow a route leg by leg, with an arrival alert and automatic advance to the next leg
• Large, readable instruments: speed and course over ground, VMG, bearing, steer-to, distance and time to waypoint and destination, and ETA
• Projected course line with time ticks
• Follow, course-up and north-up modes; magnetic or true bearings
• Crew-overboard button: press and hold to drop a mark and navigate back to it
• Touchscreen lock, so spray and stray taps can't change anything under way

TRACKS
• Record every outing; recording continues in the background with the screen off
• Track Viewer with a speed-colored track, speed chart, fast playback, and tack and jibe detection
• Stats for any stretch: distance, time, average and top speed
• GPX import and export for routes, waypoints and tracks

TIDES, CURRENTS, WIND & SUN
• NOAA tide and current predictions, computed on your device so they work offline
• 48-hour time bar to see tides, currents and wind ahead
• Wind forecast barbs (internet connection required)
• Sunrise, sunset and twilight times

TRADITIONAL PLOTTING
• Fixes, DR, EP and running fixes; bearing lines, distance arcs, current arrows and notes. Chartwork the way you learned it.

GPS & INSTRUMENTS
• Your iPhone or iPad's own GPS
• Bluetooth LE GPS receivers
• Your boat's Signal K server on the local network (experimental)
• Built-in simulator for exploring the app from shore

Pelorus Nav is an aid to navigation and planning. It is not a substitute for official charts, a proper lookout, and prudent seamanship.

Free and open source under the MIT license.

## Is Pelorus Nav safe?

Not enough ratings yet to assess Pelorus Nav.

## Is Pelorus Nav legit?

Pelorus Nav has limited verification signals. The AppsHunter Legitimacy Score for Pelorus Nav is 50 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 2 releases)

### 1.1.0 — 2026-10-28

New
- Chart Scale Boundaries layer (Settings → Charts & Layers, off by default): a labelled line where the chart shown changes to one of a different scale. Depth shading can change along it, since each chart has its own depth contours.

Fixes
- Route navigation moves on to the next waypoint when you turn for the next leg before reaching it, once the waypoint is abeam or behind you, instead of steering you back to it.
- The arrival time at a route's destination no longer disappears while you pass a waypoint wide.
- Large regulated areas (restricted, caution and anchorage areas, cable areas, fairways) no longer show straight dashed lines across open water. The change applies to each chart region as it is updated.

### 1.0.0 — 2026-10-28

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-29.*