APORIA

M1.2) Buoys with fence
In frontier style, we would suspend barbed wire fence between the four floating buoys above. This way the outlines of the parcel could be recognized as “private property”.
Shortcomings: The probability of trespassing in high sea is greater under, than above water.

M2.1) Free-floating frame marks the area we own
In case no one else owns ocean parcels, or uses this method of marking their territory, the frame would float freely around. At any given time we would own the same shape and amount of surface ocean, but ocean depths (volume) and the position of the parcel would constantly change.
Shortcoming: We would never know the current location of our parcel.

M2.2) Frame as part of an interlocked grid
In case all ocean territory would be claimed (like land) and marked in the same way, the firmly linked grid of floating frames, spanning over 361 million square kilometers of interconnected salt waters and naturally “stopped” at shores, would keep itself in place. The grid of floating frames would provide access ways to reach all parcels. Amount of surface ocean, position and depths of the parcel would be permanent.
Problem: The filling of these parameters (the water) would be in constant change.

M3) Freezing the Parcel (vertical consistency)
To ensure, that our ocean parcel would be anchored in a fixed position and contains the same water at all times, we would freeze the complete parcel from surface to ground. The block, frozen to the ground, would be a steady solution.
Shortcoming: The parcel would loose the moving qualities that define the ocean.

M4.1) Vertical Tunnel (closed in)
To fix our place in the ocean we would erect concrete walls (from 2 m above surface to the ground) around the outlines of the parcel. This way, the position of the parcel would be fixed, but water exchange would be stopped. Depending on the original bacteria, flora and fauna trapped inside the walls, (A) a self-sustained eco system could develop over time, or (B) ocean life inside the tunnel would tip over and all life within the water would die.

... The control of uncontrollable forces presents another kind of impossibility.
For example: persona, the desire of control of which leads to madness; or water, which, like persona, is only controllable when frozen. eteam's "Offshore Ocean Parcel" points out the impossibility of controlling water, thus demarcating the impossibility - and the madness - of geopolitical imperialism.
Greta Byrum

Proposal

Acquiring a 1000 square foot parcel of high seas and marking it as ours
.
Heuristics

1st step: find the owner of the ocean

Question: “Who owns the ocean?”
Political geography seems to be as wild and uncontrolled as the ocean itself.
Some governments (not the US) are adhering to the guidelines set in 2000 by the International Hydrographic Organization (IHO), an intergovernmental international organization established in 1921, which specify, that all coastal countries would have a 12 nautical mile territorial sea and a 200 nautical mile Exclusive Economic Zone (EEZ). Each country would control the economic exploitation and environmental quality of their EEZ.
Beyond these boundaries, which occupy approximately one-third of the world ocean, “high-seas”, also referred to as international waters, are not owned by anyone.

2nd step: negotiating the transfer regulations

Possibilities: apply, trade, ignore, pay, bribe, or just sail out into international waters and claim a parcel at high sea.In case of trouble, choose appropriate “flag of convenience” to determine the source of laws applied to our parcel.

3rd step: locating the lot

GPS (coordinates); in reference to shores, landmarks etc. in NM (1 nautical mile = 1852 meters)

4th step: marking the lot