Bottom Relief & Depth Contours
Find shelf breaks, canyon edges, humps, drop-offs, and bottom changes where current and bait can stack.
Today's Gulf water, mapped.
Find the edge before you burn fuel.
Open one interactive map before you leave the dock: temperature breaks, water color edges, current rips, salinity boundaries, eddy structure, bottom relief, rigs, and FADs.
Start here
- Open the map.Start with today's Gulf water, not a static screenshot.
- Read the edge.Toggle the layers you trust and tap the water for values and freshness.
- Plan the run.Use layer values, freshness, and structure context to make your own call.
No credit card. Limited Gulf captain trial access is open while we tune First Mate with real offshore use.
Ocean data, turned into fishing intelligence
Read the water before you leave the dock.
Bait moves with the water. Gamefish move with the bait. The useful question is where today's break, edge, rip, eddy, color change, bait line, or structure line sets up.
First Mate puts those layers on one touch-friendly Gulf map. Pinch, zoom, adjust transparency, and tap the water for values, source timing, and coverage notes.
The interactive map is the working surface for planning a run: fast enough to scan, detailed enough to inspect, and clear about what each layer can and cannot tell you.
What you see on the map
The layers that matter offshore.
01
Base Layers
The foundation: structure, bottom, and current direction.
Platforms & Structure
Rigs, drillships, platforms, and FADs across the Gulf with real names and positions for offshore reference.
Current Arrows
See which way the water is moving. Faster currents draw stronger, so rips and moving edges are easier to spot.
02
Fishing Intelligence Layers
The core offshore signals today, with more validated layers coming.
SST
Find blended-water temperature edges, a core offshore signal for tuna, billfish, mahi, and wahoo planning.
Chlorophyll
Read the blue-water-to-green-water edge where the food chain can stack, then compare recent daily shots when clouds break differently.
Salinity
Spot river plume edges and water-mass boundaries where different water types meet.
Deep Temperature
Check what the water column looks like below the surface, not just what the satellite sees at the top.
Eddy Edges
See moving Gulf water, Loop Current edges, and eddy structure that can concentrate bait.
Current Speed
Find faster water, shear zones, and convergence areas that can shape rips and concentrate bait.
Front/Eddy Agreement
Highlight areas where multiple independent signals line up instead of relying on one layer alone.
Built for Gulf captains
Not another static satellite image.
Interactive, not static.
Toggle layers, adjust transparency, zoom into the water, and tap points instead of squinting at a flat image.
Built around fishermen, not data layers.
Bottom relief, Loop Current movement, Mississippi plume influence, rigs, FADs, and shelf structure are brought together because they shape bait, edges, and where fish set up.
Feedback loop built in.
Tell us what matched the water and what missed so First Mate gets sharper for real offshore decisions. Send feedback.
Science without the black box
Built on published fisheries oceanography.
First Mate's layer choices are grounded in public, peer-reviewed work on fronts, eddies, water-mass boundaries, current convergence, subsurface water structure, and pelagic habitat.
What that means in the app
- Layer names use fishing language, not provider jargon.
- Map details explain what each layer is and why it matters.
- Coverage and freshness are surfaced when the data is incomplete.
- Experimental layers stay clearly marked until they are proven reliable in real Gulf conditions.
Limited trial access
Use First Mate on real Gulf runs before broad launch.
We are opening access in controlled cohorts for Gulf captains. Use the map, compare it against what you see offshore, and tell us what helps or misses.
No credit card during the trial window. We keep the group focused so feedback turns into a sharper product.