Binnacle: Nautical Calculator
Danylo Budylkin
Getting the latest details from the App Store…
Binnacle is a set of bridge instruments for merchant marine deck officers. Thirteen tools, most of them working with no signal, and none of them pretending to be more certain than it is. ON WATCH • Navigational warnings, plotted. NAVAREA and the coastal services drawn on a chart where they actually are, instead of read as a wall of text at three in the morning. Set a radius from your position and follow only the services that concern the passage. • Weather for a position and a time you choose
Top of Grossing · Navigation in India. Binnacle: Nautical Calculator is #35 there. Changes are over 7 days.
How the app presents itself on the App Store. Select a screenshot to open it full size.
Version 3.1.0 · 17 Sep 2026 · 26 days ago
The app is now Binnacle. Same tools, same account, a name that says where they live — the binnacle is the stand the compass sits in on the bridge. NEW • Manoeuvring board — CPA and TCPA for two to five contacts, and one alteration that clears them all • Heel, trim and roll period from the phone's sensors, with GM from the roll period • Coastal warnings — what the local NAVTEX carries, for the waters you are closing • Unit converter, rebuilt: 13 quantities and every unit a bridge uses CHANGED • The home screen is a live panel now: position, weather, UTC, and how many warnings are in force near you. Pull it down to refresh. • Warnings can be counted by distance from your position, and you can choose which services to follow. • A dark instrument palette throughout, meant to be read at night without wrecking your eyes. • Every tool the app has can now be pinned during setup. Four of them could not be, which was a bug nobody could see.
Every chart this app is in right now, best position first.
| Chart | Rank | 24 h | 7 days | Best | Days on chart |
|---|---|---|---|---|---|
| India· Grossing · Navigation | #35 | New entry | Change unknown | #35 | 1 |
Higher on the chart is better: #1 is at the top.
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India · Grossing · Navigation: best #35, latest #35, over 13 snapshots since 8 Oct. No snapshots from 8 Oct to 9 Oct, on 9 Oct, on 10 Oct, on 11 Oct, on 12 Oct, and on 13 Oct; the line joins the snapshots on either side.
Entries, big moves, #1s and new versions we've recorded.