We are working on a seastead design that will have a 40 by 16 foot living area above the water.
There will be 4 foot wide columns that are about 20 feet long going out from 
from the 4 corners of living area and down into the water at 45 degrees, which half of
each column under water.   The bottoms of the floats will make a rectangle about 44 feet wide and 68 long.
From the bottom of each column there will be 
2 cables going to the adjacent corners to hold it in place.
There will also be a cable making a rectangle between the bottoms of all the floats so we have some
redundancy in case one cable breaks.
The seastead is about 30,000 lbs I think but this is NOT a normal boat hull shape,
it is more like a tiny oil platform as far as drag.

We expect to use 2.5 meter diameter propellers on two submersible mixers and solar power to move
at around 1 MPH plus any help from using eddies.


I want you to help me analyze some defensive aspects of the seastead.


How thick is the stainless steel of the Cybertruck?   It seems this can stop 9 mm bullets.

If the body of the living area were Duplex Stainless and that thick then it should stop 9 mm bullets as well?


I am wondering about a vandal troubling the seastead while the family is on shore for awhile.

If the cables were jacketed (covered) Dyneema then they would not be hard to cut.
I think if the cables were duplex stainless steel and 1 inch diameter that a single hacksaw would
probably get dull before it could cut through.  Do you agree?


In extreme situations aluminum ships have burned.  Has this happened to aluminum pleasure yachts
or only aluminum war ships?
Duplex steel is not a fire risk, right?


It would be good to have ladders that could be pulled up.  

Lights at night can deter people.   Sensors and alarms.  In particular since each of the 4 floats
can move independantly if someone were to climb on one it is probably possible to detect this and
sound an alarm.

We will probably be parked further out than most yachts.  Going out into the open ocean at night
in the dark in a dingy would deter some thiefs.  The seastead probably uses dynamic position and
not a traditional mooring or anchor, so the whole seastead could even retreat further toward
open ocean if a dingy were approaching at night.   Also, much of the time the seastead will be
moving even at night, no even near a harbor.


Please discuss any other sort of fortress issues you can think of.