Seastead FAD Analysis: Caribbean Application

Location Context: Anguilla, British West Indies
Structure: 4-Point Tensegrity Design with 20ft Stainless Steel Floats

        Bottom Line Up Front: Your seastead design is essentially a massive artificial reef and Fish Aggregating Device (FAD). Given the size of the floats, the extensive underwater cabling, and the large shaded area, it has excellent potential to attract fish, provided you manage the movement speed and location correctly.
    

1. Does It Work as a FAD?

Yes, very much so. Traditional FADs are often made of old tires, bamboo, or concrete blocks. Your design offers several superior attractants:

Massive Shade: The 16x40 foot living area creates a significant shadow. In the bright Caribbean sun, this shadow signals "safety" to smaller baitfish, which in turn attracts larger predators.
Complex Structure: The four 20-foot long floats descending at 45 degrees, combined with the web of cables, create a complex 3D structure. This mimics a wreck or a reef, providing hiding spots for lobster, snapper, and grouper.
Current Breaks: The structure will disrupt strong currents, allowing fish to rest while swimming against the flow. This is a primary reason fish aggregate around FADs.

2. Marine Growth (Biofouling)

Yes, encouraging growth will significantly help the FAD aspect, but there is a trade-off with your material choice.

The Benefit

Algae, barnacles, and coral polyps will colonize the stainless steel. This "biofouling" transforms the artificial metal structure into a "living" reef. It creates an ecosystem that provides constant food (micro-organisms) and mimics nature.

The Risk (Stainless Steel)

Corrosion Warning: While Duplex Stainless Steel is strong and corrosion-resistant, marine growth can create "crevice corrosion." If barnacles attach tightly, they can trap oxygen-free water against the metal, causing pitting.

Recommendation: Clean the floats once a year (as you planned). This maintains the structural integrity while allowing a "biofilm" to build up in between cleanings. You might also consider adding sacrificial anodes (zinc blocks) to protect the steel electrically, which is standard practice for boats.

3. Movement & Speed Analysis

You mentioned speeds of 1 MPH and 1/2 MPH. How does this affect fishing?

The Verdict

Fish are accustomed to water moving past them. In the Anguilla channel, currents can run 1-2 MPH. A slow-moving seastead (1 MPH) is essentially just another current in the water.

1 MPH: Generally acceptable. It will feel like a slow drift to the fish. Most reef fish (Snapper, Grouper) will likely stay attached to the structure if it moves slowly, as they are used to holding position in currents. However, it might make bottom fishing slightly harder as the lines will drift.
1/2 MPH (0.22 m/s): Much better. This speed is negligible to fish. They will not perceive the seastead as a moving predator. If you want to "cruise" with fish in tow, keep it under 0.5 MPH.

Important: Avoid sudden stops and starts. If you power up the propellers to move, the turbulence might scatter fish temporarily. It is best to move very slowly or not at all when actively trying to fish.

4. Location Strategy (Anguilla)

Where you anchor or drift is critical for success.

Deep Water vs. Shallow Water

Deep Water (> 100m / 300ft): Best for pelagic species like Tuna, Mahi-Mahi (Dolphinfish), and Marlin. These fish like to hang out near the "blue water" drop-offs. If you want big game, go deep.
Shallow/Medium Depth (30m - 60m / 100-200ft): This is likely your best bet for a "home" FAD. The bottom here is often sandy or rocky, perfect for Snapper, Grouper, and Jacks. Anguilla has excellent bottom structure in these depths.

Distance from Land

It is generally true that FADs work better away from heavy land-based runoff (which can be muddy), but you also don't want to be too far.

1 to 3 miles off the south coast of Anguilla (facing the Caribbean) is usually ideal. It is deep quickly, but protected from the heavy Atlantic swells.
Avoid being directly in front of river mouths (though Anguilla has few major ones).

5. Operational Tactics for Success

Underwater Cameras

This is a fantastic idea. Mount them on the floats looking up and along the cables. You can watch the "community" build up over weeks. You will see when the big Snapper or Grouper arrive.

Night Lights

Highly Recommended. Install lights facing the water (under the living area). At night, turn them on.

The lights attract zooplankton and small baitfish.
The baitfish attract larger predators.
It makes night fishing from the platform very easy and safe.

Chumming (The "Secret Sauce")

If you throw fish scraps into the water, the fishing can go from "good" to "incredible" very fast.

Timing: Do it immediately. The smell plume travels fast. However, if you are moving, the chum sinks. The best tactic is to stop the seastead, throw the chum over, and then cast your line right into the chum slick.
Method: Tie a mesh bag of scraps to the side of the platform and let it hang in the water. This creates a continuous scent trail.

6. Catching Your Daily Meal

You want to catch a 5lb+ fish per day. Is this realistic?

The Expectation

If you are anchored near a reef or deep water drop-off:

With Chumming: You can expect a bite within 15 to 45 minutes during active times.
Without Chumming: It might take an hour or two of "presentation" (having your bait sit on the bottom).

Target species for 5lbs in Anguilla: Yellowtail Snapper (very common, excellent table fare), Mutton Snapper, or a large Grouper.

Best Times of Day

        Dawn (6:00 AM - 8:00 AM): The #1 best time. Fish are actively feeding after the night.
Dusk (5:30 PM - 7:00 PM): The #2 best time. Fish are feeding before night.
Night: With your lights, you can catch Snapper and Grouper that come out of hiding.
Midday: Slower fishing, but doable if you chum heavily.

    

Summary Recommendations

Anchor to Farm Fish: If you want a reliable daily catch, anchor the seastead. If you are constantly moving, you are just "scouting" for fish rather than farming them.
Go Slow: If moving, keep below 0.5 MPH.
Location: Try to anchor in 30-60ft of water, about 1-2 miles off the south shore.
Routine: Use the cameras to watch. At dawn, toss some scraps (chum) and drop a line. You should have a fish on the deck within minutes.