1) Foreword

Sim Eternal City Tech Radar is an ongoing archive where we identify, evaluate, and document technologies that can make future cities more livable, resilient, and humane—starting with the invisible systems that shape everyday life.

Water is one of those systems we rarely think about until something goes wrong: a strange smell, a rusty tint, scale buildup, or headlines about aging pipes. In most cities, these are “infrastructure issues.” In a floating city built on repurposed cruise ships and container vessels, they become something more immediate: a question of daily trust.

Sim Eternal City is not a blank-sheet city. It is a pragmatic future-city concept—built by reusing existing ships, accelerating what’s possible, and designing forward from what we already have. That pragmatism also comes with an engineering reality: legacy ship piping and internal water networks can age, corrode, and drift in performance over time, especially when a vessel shifts from temporary travel to full-time living.

This is why GEOGRID and its building-scale water management system BLOS (Building Oasis) belongs in the Tech Radar archive—not as a general “clean water” story, but as a potential core layer of operability and trust for a ship-based floating city.

2) Technology Overview

Core idea: Treat water the moment it enters a property—so the entire property behaves like a smart water plant.

GEOGRID reframes purification from “small filters everywhere” to one intelligent system for the whole network. Instead of relying on individual purifiers at each sink or end point, BLOS treats water at the entry point and then supports a consistent standard across every pipe and outlet.

What BLOS is designed to do:

  • Point-of-entry treatment: Water is treated as it enters the building (or ship), not after it has already traveled through internal lines.

  • Whole-network impact: Every tap benefits—kitchens, showers, cafeterias, clinics, laundry rooms, and utility lines.

  • Pipe-health support: Helps remove rust and reduce scaling without harsh chemicals, supporting longer infrastructure life and better water consistency.

  • Real-time sensing & monitoring: Sensors continuously track water quality and pipe conditions, making the system measurable and manageable.

  • Data-driven operations: Turns water from an invisible background utility into an operational system—supporting proactive maintenance, cost control, and reduced waste.

  • Retrofit-friendly deployment: Built for practical installation in existing properties, positioned as a solution that can be implemented efficiently.

In short, BLOS is not only a purification device. It is an operating layer: water quality + infrastructure health + monitoring in one system.

3) Company Overview

GEOGRID is a Seoul-based water-tech company led by CEO Kihyun Kim, focused on sustainable, data-driven water management for residential, educational, hospitality, and commercial buildings.

GEOGRID’s founding concept is simple and ambitious:
“Control Water, Clean Life.”

The message is clear: clean, reliable water should be a normal condition of life—not a daily personal chore managed through bottled water, scattered filters, or uncertain maintenance.

Through BLOS, GEOGRID positions its work as a shift from fixing water problems after complaints to managing water systems continuously with data—so people can trust the tap without thinking about it.

Learn more: eGEOGRID.com

4) Why Sim Eternal City Selected This Technology

BLOS is not only relevant to “future cities.” It is especially relevant to Sim Eternal City because the project is built on repurposed ships, and ships bring a specific set of risks and constraints that typical new-build cities do not.

A. Legacy ship piping makes “tap trust” a high-stakes issue

Cruise ships and container vessels were not originally designed to operate as long-term, multi-generational residential cities. Over time, internal water networks can face:

  • corrosion and rust tint

  • scaling and pressure inconsistencies

  • performance drift across long pipe runs

  • potential biofilm risk and hygiene concerns

  • uneven quality between near-source and far-end outlets

When a vessel shifts from temporary travel to full-time city life, water stops being an amenity and becomes an always-on public health baseline. For Sim Eternal City, that means a basic urban requirement—trustworthy water at every tap—can become fragile unless there is a ship-scale control system.

B. One entry point, whole-network protection fits ship architecture

A ship-based city is a dense “vertical neighborhood” with shared risers, long pipe runs, and many endpoints: cabins, kitchens, restaurants, clinics, laundries, schools, gyms, and more.
Managing quality through hundreds of individual purifiers creates operational clutter and uneven performance. BLOS matches ship reality because it is designed to treat water at entry and support the whole network—so every outlet benefits, including the most distant and vulnerable endpoints.

C. Data is the difference between maintenance and governance

On a ship-based city, water is not only a facility issue—it is a governance issue. You need visibility across quality, pipe health, and usage patterns to prevent incidents before they become public-health events.
Because BLOS is built around real-time sensors and monitoring, it can support:

  • early warnings (quality drift, abnormal pipe behavior)

  • predictive maintenance cycles (fewer emergency shutdowns)

  • transparent reporting to residents (stronger trust)

  • operational accountability (measurable performance over time)

D. Retrofit reality: deployability is not optional

Sim Eternal City is fundamentally a retrofit project. The city evolves by upgrading and reconfiguring existing vessels—not by rebuilding everything from scratch. That makes deployability a deciding factor.
A solution must deliver immediate quality gains without requiring total internal demolition. BLOS’s building-scale, retrofit-friendly logic aligns with this phased evolution approach.

E. Water reliability becomes climate resilience—on water

A floating city still lives inside climate volatility: storms, heat waves, supply disruptions, and changing source water conditions. Even if the city floats, its residents need a stable internal baseline.
BLOS strengthens that baseline by treating water quality as a continuously managed system—not a one-time installation.

Therefore, in Sim Eternal City, BLOS is positioned as a foundational layer: a ship-scale “water control and trust system” that protects residents, reduces infrastructure risk, and enables long-term operability in a retrofitted floating city.