Comparison

ECDIS NAUTICAL CHART SYMBOLS vs Radar Plotting

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

ECDIS NAUTICAL CHART SYMBOLS

A comprehensive reference guide to symbols used on electronic nautical charts, based on IHO specifications. It offers quick lookup, detailed graphics, and offline access for navigation and revision.

Highlights
  • Reference guide to INT 1 symbols
  • Fully searchable index
  • Tap & Enlarge feature
  • Offline access
  • Bonus emergency tips
Features
Read full description

REFERENCE GUIDE TO THE SYMBOLS USED ON ELECTRONIC (ECDIS) NAUTICAL CHARTS SPECIFIED BY THE INTERNATIONAL HYDROGRAPHIC ORGANIZATION (IHO). ************ FEATURES and BENEFITS ************ - Perfect for reference, learning & revision - Hi-res graphics - Tap & Enlarge feature for greater detail - Fully searchable index to all the symbols - Always with you on your iPhone or iPad - No internet connection needed >>> FULL APP — AD FREE | NO IN-APP PURCHASES | NO SUBSCRIPTION ************ LATEST UPDATE INCLUDES ************ * Updated for current iPhone and iOS versions * Save frequently used chart symbols to My Chart Symbols for quicker reference * Jump back to recently viewed pages, with older pages neatly grouped in one menu * Improved favourite and Home controls for clearer, more consistent navigation * Refined layout and spacing throughout the app ************ Plus FREE Bonus Content from "Safe Skipper" ************ "ELECTRONIC NAUTICAL CHART SYMBOLS & ABBREVIATIONS" provides quick reference to the "INT 1" symbols specified by the International Hydrographic Organization (IHO). There are five main sections in this app, each with lettered sub-sections organized into categories to guide users through the hundreds of symbols. The main sections are: GENERAL - chart layouts, positions, distances, directions and compass. TOPOGRAPHY - landmarks, ports and coastal land features. HYDROGRAPHY - tides, currents, depths, nature of the seabed, underwater obstructions, tracks, areas, limits and hydrographic terms. NAVIGATION AIDS & SERVICES - lights, buoys, fog signals, radar, radio, services and small craft facilities. INDEX & ABBREVIATIONS - international abbreviations and index to symbols and abbreviations. ************* FREE Bonus Content from "Safe Skipper" ***************************** A bonus section has tips on how to deal with emergencies including: Abandon ship; Dismasting; Distress Signals; Engine Failure; Fire Fighting; Flares; Getting a tow; Helicopter rescue; Holed hull; Man overboard; Medical emergency; Mayday; Panpan; Securité. INDEX The index is an A-Z of symbols and abbreviations and enables the user to quickly look up the symbols and see them in context with others in the same categories. This app is based on the United Kingdom Hydrographic Office's print publication "Chart 5011 (INT 1) EDITION 2" Admiralty Charts Publication and "Chart No.1 United States of America Nautical Chart Symbols, Abbreviations and Terms". We have an on-going program of marine navigation and boating safety apps, so please contact us with any ideas or features that you would like to see included. Safe boating!

About

Radar Plotting

This app offers advanced radar plotting for maritime navigation. It allows users to calculate critical encounter data, plan maneuvers, and analyze complex scenarios with interactive visualizations. Designed for training and decision support, it aids in understanding vessel interactions.

Highlights
  • Kinematic calculations (CPA/TCPA, aspect)
  • True and relative speed estimation
  • Evasive maneuver planning with COLREG guidance
  • Rescue and escape scenario planning
  • Double-target analysis
  • Current and drift estimation
  • Interactive radar canvas with playback
Features
Read full description

Radar Plotting provides advanced radar-plotting capabilities for iPhone and iPad. Compute CPA/TCPA, estimate true motion, plan evasive/rescue/escape manoeuvres, and analyse two-target encounters — all visualised on an interactive radar sheet. Highlights: - Precise kinematic calculations (CPA/TCPA, aspect, true & relative speed) - Evasive manoeuvres with COLREG guidance - Rescue & escape planning, including scenarios with faster vessels - Double-target handling - Current/drift estimation - Interactive canvas with adjustable scales and animated trajectory playback - Import/export via QR code and PDF report generation Safety note: This app is for training and decision support. It does not replace certified navigational equipment or official procedures. Always follow COLREG and local/company rules.

Screenshots

ECDIS NAUTICAL CHART SYMBOLS4 screens
Radar Plotting3 screens

Verdict

The call

The clearest difference is review sentiment: ECDIS NAUTICAL CHART SYMBOLS at 100% against Radar Plotting's 50%. ECDIS NAUTICAL CHART SYMBOLS also leads on price ($1.99 vs $7.99). Radar Plotting's advantage is rating (5.0 vs 1.0) and update cadence (every 5 months vs every 78 months). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

ECDIS NAUTICAL CHART SYMBOLS costs $1.99 and Radar Plotting $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Radar Plotting holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews complicate that: 100% of ECDIS NAUTICAL CHART SYMBOLS's written reviews are positive against 50% of Radar Plotting's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

ECDIS NAUTICAL CHART SYMBOLS ships an update every 78 months, Radar Plotting every 5 months. The most recent releases landed on October 29, 2026 and October 26, 2026 respectively.

Scorecard4 real differences · 6 level
ECDIS NAUTICAL CHART SYMBOLS versus Radar Plotting: the parameters behind the verdict, then further details
ParameterECDIS NAUTICAL CHART SYMBOLSRadar Plotting
Price$1.99 — better$7.99
Rating1.0 (1 ratings)5.0 (1 ratings) — better
Positive reviews100.0% of reviews — better50.0% of reviews
Number of ratings11
Update frequencyEvery 78 monthsEvery 5 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size39 MB17 MB
Age rating4+4+
DeveloperThe Other HatGiacomo Gabriele

Customer experience

ECDIS NAUTICAL CHART SYMBOLS

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Radar Plotting

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

None

ECDIS NAUTICAL CHART SYMBOLS

No in-app purchases

None

Radar Plotting

No in-app purchases

Questions

Is ECDIS NAUTICAL CHART SYMBOLS free?
ECDIS NAUTICAL CHART SYMBOLS costs $1.99, with no in-app purchases.
Is Radar Plotting free?
Radar Plotting costs $7.99, with no in-app purchases.
Which has better reviews, ECDIS NAUTICAL CHART SYMBOLS or Radar Plotting?
Radar Plotting is rated higher. ECDIS NAUTICAL CHART SYMBOLS averages 1.0 out of 5 from 1 ratings, while Radar Plotting averages 5.0 from 1 ratings.
Do ECDIS NAUTICAL CHART SYMBOLS or Radar Plotting have ads?
Neither ECDIS NAUTICAL CHART SYMBOLS nor Radar Plotting shows ads.
Which is updated more often, ECDIS NAUTICAL CHART SYMBOLS or Radar Plotting?
ECDIS NAUTICAL CHART SYMBOLS ships an update every 78 months, and Radar Plotting every 5 months. Most recently, ECDIS NAUTICAL CHART SYMBOLS was updated on October 29, 2026 and Radar Plotting on October 26, 2026.

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