Marine Rules & Signals
by FB Imray Laurie Norie & Wilson GmbH
- Navigation
- Paid
- Zombie
- Rating
- 2.9
- 7 ratings · US storefront
- Top 90%among 111 Navigation apps
- Last update
- Oct 7, 2019
- Version 3.2
- Size
- 29 MB
- Category
- Navigation
- Tracked since
- Oct 9, 2026
Estimated revenue
A model estimate with a likely range, not a reported figure.
No estimate. Apps outside the grossing charts, and some countries, have no reliable rank-to-revenue curve, so we show nothing rather than a guess.
How this estimate is made
Rank: we take the app's best Top Grossing rank on the latest chart day. Category ranks are converted into an equivalent overall rank, because a #10 in Finance earns far less than a #10 overall.
Curve: that equivalent rank is read off a rank-to-revenue curve anchored on public company revenue and market-data reports for the US iPhone App Store.
Country: the curve is scaled per country (Japan is roughly a third of the US, Türkiye under 1%). Where we have no scale, such as China, there is no estimate.
Range: the likely range widens with country, category and chart depth. It is a plausible span, not a statistical confidence interval.
Not included: ads, payments outside the App Store, and any difference between gross sales and what the developer keeps. Low confidence means indirect data; medium means several independent sources agree.
Full methodScreenshots
As shown on the App Store listing.
About this app
Text from the App Store listing.
The reference guide to rules and signals at sea. Part of a series of Marine Navigation apps, Rules & Signals is a useful tool for sailors, fishermen, surfers and people involved in sea water sports. The Imray Marine Navigation reference products are intended for quick reference and learning.
Beautifully illustrated with diagrams and short, clear text. Remind yourself quickly about a rule or light, or learn at home, traveling or in the winter while planning your trips.
INCLUDES
RULES OF THE ROAD:
- Steering and sailing rules.
- Lights and shapes: day and night time marking of boats.
- Sound signals in restricted visibility. Actual sounds.
- Distress signals.
- Full Colregs text.
SIGNALS & COMMUNICATION:
- Buoys: worldwide buoyage systems A & B and animated harbour approaches.
- Buoy lights, animated.
- Sample harbour charts from around the world, with animated lights.
- Flags: flag translator, phonetic alphabet, morse code and message builder.
- Dual flag messages.
- Racing flags.
- Semaphore flags.
- Radio calls including Mayday/PanPan and radio channels.
- Life saving communication including air rescue: Solas V.
- Communication with air rescue.
LEARNING SYSTEM:
- Learning cards for all content, by section or for all Rules together.
Content can be scrolled, viewed individually or in sequence. Large images (charts and at a glance images) can be zoomed and panned.
Based on the International Regulations for Preventing Collisions and Sea, 1972, with amendments in force from November 1995, SOLAS Chapter V Regulation 29 and the general guidelines for buoys and signals.
LANGUAGES
English, French, German, Italian, Spanish, Japanese
ABOUT US
Imray are a leading chart and marine book publishers, based in England and with a catalogue of charts that covers Europe, the Mediterranean and the Caribbean. Imray's pilot books cover the whole world in extensive detail.
In partnership with Imray, software developers and sailors.
Follow us on Twitter - http://twitter.com/imray_charts
Facebook - imraynautical
Look out for other applications in the Marine Navigation Series from Imray:
TIDES PLANNER - tide predictions any date
MARINE CHARTS - Europe Atlantic, Mediterranean, Caribbean, Australia
BOAT INSTRUMENTS & AIS (requires WiFI NMEA bridge)
CHART SYMBOLS
What’s new
Release notes for the latest version, as written by the developer.
- iOS13 compatibility including dark mode.
Rank history
Daily position in the Italy charts. #1 is at the top.
- Best rank
- #25
- Current rank
- #30
- Days charting
- 7 of 7
On the charts today
Small & simple score
How realistic it is for a small team to build something like this.
75/100
Not flagged as small & simple
- Developer size0% · 25
Developer: 6 apps on the charts
- Audience size100% · 20
Ratings: 7
- App size100% · 10
Size: 29 MB
- Price model100% · 15
Price model: paid
- Demand proof100% · 30
Best rank #1, 95 countries
An indicator, not a fact. We can't see team size. Calculated Oct 25, 2026 · method i2
How the score worksVersion history
- 3.2LatestReleased Oct 7, 2019