# MuirWave — Underwater Acoustic Prediction

> Underwater Acoustic Prediction (iPhone/iPad app by Jesse Webber.)

- Source: https://appshunter.io/ios/app/muirwave/id6790740794 (this page in markdown: same URL + `.md`)
- Developer: [Jesse Webber](https://appshunter.io/developer/1883397481)
- Category: Navigation, Reference
- Price: Free
- Age rating: 4+
- Requires: iOS 26.0 · 145 MB
- Languages: American English
- Released: 2026-08-12
- Data updated: 2026-10-15

## What is MuirWave?

MuirWave is a native app for iPad, iPhone and Mac for underwater acoustic propagation prediction. Drop a pin anywhere in the world ocean, set your source and receiver geometry, and see how sound travels through the water column — ray paths, transmission loss, depth excess, signal excess, ambient noise floor — computed on-device from textbook acoustic physics and bundled public-domain ocean data.

Designed for civilian marine-acoustic work: environmental impact-assessment consultancies, hydrographic and oceanographic survey crews, marine-mammal observers and PAM operators, academic researchers, and technically-inclined commercial and recreational sailors.

— Bundled global ocean data —

The app ships with full global-coverage data ready to use offline:

• GEBCO 2025 sub-ice bathymetry at 5 arc-minute resolution
• World Ocean Atlas 2023 climatology at 1° "Compact" resolution (24 depth levels)
• Dutkiewicz seabed sediment classification
• Halpern shipping-density layer for ambient-noise modelling

All of the above is free — no account, no subscription. Open the app, drop a pin, see your prediction. Your projects sync across your devices via iCloud, also free.

— MuirWave Live: real-ocean conditions (subscription, 7-day free trial) —

Upgrade the climatology to the real ocean. MuirWave Live streams operational HYCOM nowcast/forecast sound-speed profiles, GFS wind, waves and sea state, and depth-resolved ocean currents to your pin — plus downloadable 0.25° regional operating-area packs (24- and 72-depth tiers) so the same high-resolution data works offshore, offline. Annual or monthly; every new subscription starts with a 7-day free trial.

— MuirWave Pro: professional deliverables (one-time purchase) —

For consultants and survey leads: marine-mammal impact ranges with NMFS-OPR-71 (2024) thresholds, mitigation planning, and clean, un-watermarked PDF deliverables — the formal EIA report, the impact-methodology document, and the brief sheet. Buy once, keep forever.

— Open, traceable physics —

Every line of the prediction stack is traceable to its public-domain or permissively-licensed source:

• Sound speed — Mackenzie 1981 nine-term equation
• Absorption — Francois & Garrison 1982
• Bottom loss — Hamilton 1980
• Ambient noise — Wenz 1962
• Propagation theory — Jensen, Kuperman, Porter & Schmidt, "Computational Ocean Acoustics"

No GPL or proprietary modelling code is bundled. The full provenance trail is published at muirwave.com/provenance.

— Built for the field, on all your Apple devices —

• A native interface designed for the dark conditions of shipboard and field use — on the iPad at the rail, the iPhone in your pocket, the Mac at your desk
• Works fully offline once installed; no cloud account needed
• Live ocean conditions (HYCOM nowcast / forecast) are an optional toggle
• Maritime-traditional units (feet, fathoms, nautical miles, DMS lat/lon) are first-class; metric and MGRS are one tap away

— Privacy —

No analytics, no advertising, no tracking, no account, no personal data. Settings, scenarios, and downloaded packs stay on your device.

Terms of Use: https://muirwave.com/terms
Privacy Policy: https://muirwave.com/privacy

— What's next —

Future updates will add marine-mammal hearing-weighting curves (NMFS 2018), additional source models for EIA work, and further export and reporting features. Roadmap and release notes published on muirwave.com.

## Is MuirWave safe?

Not enough ratings yet to assess MuirWave.

## Is MuirWave legit?

MuirWave has limited verification signals. The AppsHunter Legitimacy Score for MuirWave is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 4 releases)

### 1.0.3 — 2026-09-26

This update fixes compatibility with iPadOS and iOS 27.
• A long-press on the map places the source pin under your finger again — on iPadOS 27 it could land where you last touched.
• The land fill now lines up with the coastline as soon as a project opens.
• Small label fixes on the ray-path and sound-speed profile charts.

### 1.0.2 — 2026-09-05

Report accuracy and provenance.

• Every citation in the Impact Assessment PDF, CSV and GeoJSON now comes from a single verified source registry. Corrected: the NMFS threshold-table reference, the weighting-curve caption, an EPBC attribution, and the JNCC soft-start duration (now "normally not less than 20 minutes"). Fish reports no longer cite a marine-mammal-only source.
• Every export carries its provenance: a PROVENANCE block in CSV, a provenance member and per-ring sources in GeoJSON, a visible source line on figure PNGs, and a "Threshold table sources" line in the PDF.
• Mitigation trade-off rows show the soft-start / ADD dose credit (SEL) when peak pressure governs the headline range, with a note explaining why the headline does not move.
• Layout polish: the map legend clears the chip cluster on iPad mini with the Impact panel open; the CONVENTION label no longer breaks mid-word; the BSH badge no longer wraps; the PDF weighting plot no longer draws through its legend.
• Mac: the Acoustics canvas fills widescreen and ultrawide windows.

### 1.0.1 — 2026-08-23

NEW — IMPACT ASSESSMENT REPORT (PRO)

A client-ready marine mammal impact assessment: governing ranges summary, per-hearing-group criteria, auditory weighting curves, source spectrum and TL-vs-range figures, and maps carrying scale bars, north arrows and drawn mitigation zones.

Three new export formats join the PDF (Pro): Data (CSV), GIS (GeoJSON) and Figure (PNG) — isopleths drop straight into your own GIS or report document.

Expanded criteria: TTS ranges alongside injury (NMFS 2024 and Southall 2019), the NMFS 2005 Level B behavioural line, fish TTS from Popper et al., and a 0 / 6 / 10 / 15 dB attenuation sensitivity table. Fleeing and stationary receivers now sit side by side.

Reports, data and figures now live in one Export sheet, reachable from either panel group.

FIXED

• Fleeing-receiver ranges corrected — the fleeing model now applies the impulsive to non-impulsive transition, which had been over-predicting those ranges.
• Project renames now reach your other devices promptly, and the Projects page shows live sync status. A save that fails now tells you instead of quietly reverting later.
• Prices no longer stick on "Fetching price…" when the App Store is slow to answer.
• Environment summaries on the rail, dock and pinned chips follow the probe instead of staying on the scenario pin.
• A wide pass of layout fixes across iPhone and iPad: text no longer truncates in the top bar, rail tiles, map readouts or Settings, and the export sheets fit properly on an iPad mini.

### 1.0.0 — 2026-08-12

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 2026-10-15.*