#1 AeroBusiness, #2 Starship Lander, #3 MeasureGeo, #4 Improv, #5 NDVI Scope, article Finding pilots without emitting RF -- Combat Search and Rescue (CSAR) RF flashlight from space, on X https://apps.apple.com/us/app/sentinel-2-clear-days/id6819667305 If you like seeing change detection, made a cool app now available on iOS ($2 one time) for anyone doing #OSINT to create Sentinel 2 (multispectral) timelapses/change detection. Helps you see before you spend money from higher resolution commercial vendors. Many thanks to @SoarAtlas for the inspiration. Will be rolling out more improvements over the next week or two. CC: @bradyafr @tom_bike @GeoConfirmed @zarGEOINT @Nrg8000 @planet @vantortech @umbraspace @iceye_global @Osinttechnical @RALee85 @FaytuksNetwork @thewarzonewire @elonmusk Made with the help of @bot @grok and @cursor_ai

#1 AeroBusiness#2 Starship Lander#3 MeasureGeo#4 Improv#5 NDVI ScopeArticle Finding pilots without emitting RF -- Combat Search a...On X https://apps.apple.com/us/app/sentinel-2-clear-days/id681...
Marshall Frith

Bathymetry Maps

Bathymetry Maps

Draw an area on US water, pull NOAA ENC charted soundings, colour-ramp depths, and export KMZ. Not for navigation.

Marshall Tyler Frith

Bathymetry Maps is an iPhone app for pulling NOAA ENC charted soundings for an area you draw, previewing them colour-ramped by depth (feet, MLLW), and exporting a GIS-friendly KMZ via the share sheet.

This page is the App Store Support landing for Bathymetry Maps. It is the iOS edition of the desktop NOAA Sounding Puller / browser depth preview — ENC soundings only on iOS v1 (no BlueTopo, eHydro, or tide composite).

Not for navigation. Charted soundings are shoal-biased reference data. Do not steer by this app. Always use official charts and a proper navigation system underway.

How to use

  1. Open the map (Standard or Satellite / Hybrid).
  2. Draw an area of interest: a radius (center + radius) or a simple polygon (tap vertices, then done).
  3. Pull NOAA ENC soundings for that area (harbour and approach scales by default). The app shows sounding points colour-banded by depth, plus a count / shallowest summary when data is available.
  4. Export KMZ and send it with the share sheet (Google Earth, Files, email, etc.).
  5. Clear and start over when you want a new area.

No account and no API key. Internet is required to load map tiles and to query NOAA.

Privacy

Privacy Policy — no account, no ads, no analytics SDK. The app talks to NOAA ENC ArcGIS REST and Apple MapKit tiles only. Your area of interest is not sent to Marshall’s servers.

Support

Questions, bug reports, or App Store review contact go through the contact form with Bathymetry Maps in the subject. Messages reach Marshall Frith directly. There is no in-app chat or ticket system.

App Store

Price $1.99 · iPhone · Bundle com.marshallfrith.bathymetrymaps (suggested)