cloud_offOffline-Ready Navigation

Offline-Ready Fishing Navigation

Download maps, charts, and relief shading before the trip so GPS navigation, routes, and waypoints stay with you offshore

Offline maps working without cell service

Why Offline Capability Matters

When you're 50 miles offshore targeting Grouper, cell service can disappear quickly. If you did not prepare the map area ahead of time, chart context, waypoints, and route planning can become harder to use when you need them most.

Fish Fathom was built for offshore and coastal anglers who need dependable navigation when coverage drops. With downloaded maps, charts, and relief shading, the app keeps GPS navigation, saved routes, and saved waypoints available offline.

Download what you need before leaving the dock, then run the trip without relying on a weak signal. Fresh Offshore Conditions SST, Plankton/chlorophyll tiles, Captain Brad AI, and connected recommendation features still require an internet connection, but your downloaded navigation tools stay available on the water.

How to Download Maps for Offline Use

1

Select Your Region

Pan and zoom to the area where you'll be fishing, then choose the section of coast or offshore water you want available offline.

2

Choose Map Layers

Select the offline assets you want on the device, including charts and relief shading. More detail uses more storage.

3

Download & Go

Download before the trip and you're ready to navigate with GPS, routes, and waypoints even when service drops.

What Works Offline

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NOAA ENC Charts

Official electronic navigation charts with depth contours, navigation aids, and hazards available offline once downloaded.

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HD Relief Shading

High-definition underwater terrain visualization stays available for downloaded areas when coverage is supported.

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Waypoints & Routes

Create, edit, and navigate saved waypoints and routes offline once the area is downloaded.

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GPS Navigation

Track your position against downloaded map context, saved routes, and waypoints using device GPS.

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Unlimited Regions

Save the regions you need for upcoming trips so your core navigation workflow stays available beyond cell range.

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Hyper Performance

Downloaded maps render quickly without waiting on a weak connection or stalled tile requests.

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Clear Connected-Layer Limits

Fresh Offshore Conditions SST and Plankton/chlorophyll require connectivity; previously viewed tiles should be treated as stale planning context when service is flaky.

Storage Requirements

Small Region (10 sq mi)

Approximately 50-100 MB

Example: Local reef area, nearshore fishing grounds

Medium Region (100 sq mi)

Approximately 500 MB - 1 GB

Example: Entire bay system, offshore ledge area

Large Region (1,000 sq mi)

Approximately 5-10 GB

Example: Entire coastline section, major fishing region

Tip: Download only the specific areas you fish to save storage space. You can always download additional regions later when connected to WiFi.

Offline Coverage Area

  • ✓
    US Coastal Waters: East Coast, West Coast, Gulf of America - NOAA ENC coverage where available
  • ✓
    Hawaii: Hawaiian waters with supported NOAA charts and available relief shading
  • ✓
    Great Lakes: Superior, Michigan, Huron, Erie, Ontario - supported navigation chart coverage
  • ✓
    Alaska: Supported chart coverage for many Alaskan waters and fishing areas
  • ✓
    Offshore: Download supported chart areas before leaving service

Benefits of Offline Navigation

  • ✓
    Fish Offshore: No cell service? Download your core navigation map before the trip and navigate confidently offshore.
  • ✓
    Battery Savings: No cellular radio means longer battery life when you're on the water all day.
  • ✓
    Instant Performance: Maps load instantly without waiting for network requests or tile downloads.
  • ✓
    Save Data Costs: No cellular data usage while navigating - perfect for limited data plans.
  • ✓
    Peace of Mind: Know your downloaded maps, routes, waypoints, and GPS context are ready before you lose phone signal.
  • ✓
    Clear Boundaries: Downloaded maps and navigation work offline, while fresh Offshore Conditions SST, Plankton/chlorophyll, Captain Brad AI, and connected recommendations require internet.

Ready for Offline-Ready Fishing Navigation?

Download your maps before the trip, then keep map context, routes, and waypoints available when service drops offshore.

Download for iOS Download for Android